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Canon EOS R100 Review

Thanks to its ultra-affordable price, compact size, light weight, simplicity of use, and great image quality, the Canon EOS M50 was the #1 selling mirrorless camera in the U.S. market, and the Canon EOS M50 Mark II followed its lead into great popularity.

The Canon EOS R50, introduced just over 3 months prior to the R100 announcement, became the entry-level model in the EOS R series, Canon's review time latest camera series. Featuring upgrades to the M50 II's attractions, the Canon EOS R50 provided an enticing migration path from the M50 II to the R series and the RF Lenses, with only a modest bump in price.

However, the R50 had enough controls, features, and performance to not seem like a fully entry-level camera. With the EOS R100, Canon takes entry level in the R series down to a remarkably lower level — in terms of price. The R100's list price is $200.00 lower (only $479.00 USD) than the R50, yet the R100 still has many of the DSLR and mirrorless interchangeable lens camera features we've come to expect, including professional-grade image quality.

Compact and lightweight are popular camera features, especially for entry-level users, and the R100 is all about those attributes. The R100 shares the R50's size, but the R100 is lighter than that lightweight camera. Though slightly thicker, the R100 is even smaller and lighter than the M50 Mark II. Only Canon's tiniest M-series cameras, such as the Canon EOS M200, are smaller or lighter than the R100.

The additional features that made the M50 and M50 II ultra-popular are again featured in the R100, including ease of use, a solid AF system, and a useful set of controls.

Note that the R100's position in the R-series lineup is reflected in its name, with the number following the "R" indicating the camera's position in the lineup. The higher the number, the lower end the camera, and the R100 enters the market as the entry-level position.

The entry-level consumer and enthusiasts this camera targets are likely using their phone cameras with frequency. Limiting to the phone's image quality is the size of its imaging sensor. The biggest imaging sensor in an iPhone at review time is only 9.8 x 7.3mm, while the R100's imaging sensor measures 22.3 x 14.9mm. Those numbers make the total light-capturing area difference 332.27mm² vs. 71.54mm².

It doesn't take an engineer to understand that a far larger imaging sensor translates into far more light captured, and the massively larger lens plays a similarly significant role in image quality. Your phone camera images may look good on your phone, but those images, especially those captured in low light, and especially those with subject motion, tend to fall apart when viewed at the detail level.

Yes, your phone is convenient and easy to use. Want high-quality images from an inexpensive camera that is as easy to use as your phone? The Canon EOS R100 is your new camera.

From the ease-of-use standpoint, turn the R100 on and take pictures. The R100's A+ mode determines the settings required, freeing the photographer to capture the moment. Beginners wanting to move to the next step have options ranging from Creative Assist aided adjustments up to full manual control.

As I said in the EOS R100 review, when simplicity and convenience are important, this camera ensures that image quality does not suffer. While the R100 can deliver professional-grade image quality, advanced and professional photographers are going to find this camera's simplicity, including reduced controls, settings, and operating speed, along with the small grip, detrimental.

Summary of Canon EOS R100 Features

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• 24.1 Megapixel APS-C Canon CMOS Imaging Sensor (same as the M50 II, similar resolution to the R50 and R10)
• DIGIC 8 Image Processor
• ISO 100–12800 (in 1/3- or 1-stop increments), Expandable up to H 25600
• High-Speed Continuous Shooting at up to 6.5 fps with One Shot AF, 3.5 fps with continuous AF, (1st curtain electronic shutter, continuous AF not available with electronic shutter, full mechanical shutter not available), up to 1/4000 shutter
• Dual Pixel CMOS AF system
• AF Working Range of EV -4 – 18
• 4K UHD 24 fps (Cropped) Movies, FHD 60 fps (Full-Width)
• Digital Movie IS (no IBIS — In-Body Image Stabilization)
• 0.39" (9.9mm) OLED Color EVF, 2.36 million dots, with 60 fps Refresh Rate
• 3" (75mm) LCD with 1.04 million dots (not Vari-Angle or Touchscreen)
• Single UHS-I SD Memory Card Slot
• Conventional Hot Shoe (not Multi-function)
• Wi-Fi and Bluetooth
• Not Dust and Weather Resistance
• No viewfinder level indicator
• No LCD coatings
• No self-cleaning imaging sensor
• No Headphone Port
• RF Lens Mount, Compatible with EF/EF-S/TS-E/MP-E Lenses with Adapter
• Super Compact, Ultra-Lightweight, Inexpensive

While the RF mount specification may seem trivial (all interchangeable lens cameras have a mount), this mount is a big deal, especially to the lens engineers. The RF mount retains the large 54mm inner diameter advantage of the EF mount (for reference, the Nikon Z mount has a similar 55mm diameter, the Nikon F-mount is only 44mm, the Canon EF-M mount is 47mm, and the Sony E mount is 46.1mm), maintaining the rigidity, durability, strength, and ultra-wide aperture support a large-diameter mount provides while reducing the flange back distance (distance from the back of the lens's mount to the imaging sensor) from 44mm to 20mm.

The RF mount supports optical designs that are potentially smaller than possible with the EF mount and often include large-diameter rear-positioned elements that can feature a reduced angle of light rays in the image circle periphery. Bending light to a lesser degree can improve image quality, including better-corrected aberrations. The larger rear-element design of RF lenses also lends to a comfortable shape and weight balance. Improved camera-lens communication also increases performance, including instant feedback for enhanced in-lens image stabilization.

The lens is critical to the camera's overall performance, and Canon's RF lenses are impressive — reason alone to buy into the Canon EOS R-series cameras. Canon lens engineers remain excited about the performance the RF mount avails to them, and I was again told to expect great features and performance still to come.

A big reason to choose an RF-mount camera is that Canon has not introduced a new EF, EF-S, or EF-M lens in years.

Sensor and Image Quality

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One of the similarities the R100 shares with the M50 Mark II is image quality. The same APS-C imaging sensor and DIGIC 8-powered processing engine create the same image quality. Fortunately, that image quality is professional grade.

Model	FOVCF	Sensor	Pixel Size	Pixels/Megapixels		Viewfinder		DLA*
Canon EOS R5	1.0x	36.0 x 24.0mm	4.39µm	8192 x 5464	45.0	.76x	100%	f/7.1
Canon EOS R6 Mark II	1.0x	36.0 x 24.0mm	6.00µm	6000 x 4000	24.2	.76x	100%	f/9.6
Canon EOS R6	1.0x	36.0 x 24.0mm	6.56µm	5472 x 3648	20.1	.76x	100%	f/10.6
Canon EOS R7	1.6x	22.3 x 14.9mm	3.20µm	6960 x 4640	32.5		100%	f/5.2
Canon EOS R8	1.0x	36.0 x 24.0mm	6.00µm	6000 x 4000	24.2	.70x	100%	DLA
Canon EOS R10	1.6x	22.3 x 14.9mm	3.72µm	6000 x 4000	24.2		100%	f/6.0
Canon EOS R50	1.6x	22.3 x 14.9mm	3.72µm	6000 x 4000	24.2	.95x	100%	DLA
Canon EOS R100	1.6x	22.3 x 14.9mm	3.72µm	6000 x 4000	24.1	f/6.0
Canon EOS R	1.0x	36.0 x 24.0mm	5.36µm	6720 x 4480	30.3	.71x	100%	f/8.6
Canon EOS RP	1.0x	35.9 x 24.0mm	5.75µm	6240 x 4160	26.2	.70x	100%	f/9.3
Sony a7 IV	1.0x	35.9 x 23.9mm	5.1µm	7008 x 4672	33.0	.78x	100%	f/8.2
Canon EOS M6 Mark II	1.6x	22.3 x 14.9mm	3.20µm	6960 x 4640	32.5	opt	100%	f/5.2
Canon EOS M50 Mark II	1.6x	22.3 x 14.9mm	3.72µm	6000 x 4000	24.1		100%	f/6.0
Canon EOS M200	1.6x	22.3 x 14.9mm	3.72µm	6000 x 4000	24.1	n/a	n/a	f/6.0

The 24 MP resolution is an extremely popular EOS camera resolution. Even the Canon EOS R3, a camera deployed primarily by professionals and serious amateurs at the top of their game, has a 24 MP imaging sensor. This resolution is easily adequate for full- and double-page magazine spreads and for most uses of an entry-level camera.

The R100's available aspect ratios are 3:2 (6000 x 4000, default), 4:3 (5328 x 4000), 16:9 (6000 x 3368), and 1:1 (4000 x 4000). Smaller M, S1, and S2 sizes are additionally available for the JPG file format.

As mentioned, the R100 shares the M50 II's image quality, but similarities go much further. The R100 also shares the same imaging sensor and image quality as the M50, M5, M6, M100, M200, T7i, 77D, 80D, etc. Therefore, this EOS R100 image quality discussion is based on the EOS M50's lab performance. To save days of testing, the R100's image quality/resolution and noise test results are used to illustrate the R100's image quality.

The resolution of many EOS cameras can be compared using the Canon EF 200mm f/2L IS USM Lens test results, and the Canon RF 85mm F1.2 L USM Lens can be selected to compare many R-series cameras.

The R100's ISO range is 100-12800 in 1/3- or full-stop increments, along with the extended H (25600) setting. The highest ISO options will have a low SNR (Signal-to-Noise Ratio), making the results noisy.

The Kodak Color Control Patches shown in the standard ISO noise test results are generated from RAW images with (this is key) no noise reduction (unless specifically indicated by the result set). These evenly colored patches make noise readily apparent, and these samples represent a worst-case scenario. Most real-world subjects have details that better hide the noise.

How apparent is the difference between camera models is the big question. If you struggle to see the difference in the color blocks, you will not likely discern it in your images either.

The R100's ISO 100 results are quite clean, as usual for EOS cameras. Also normal is that increasing the ISO setting increases the apparent noise. My personal tolerance for current APS-C sensor noise is usually ISO 3200. While the results at ISO 6400 are noisy, they can be usable. ISO 12800 is a last resort, and a significant percentage of the details get lost in the low signal-to-noise ratio at ISO 25600.

In addition to the standard RAW-captured images, many R100 noise test image sets are provided in the noise tool. One additional set explores the in-camera JPG file format. This set again utilizes the Standard Picture Style but with the default settings used. The most obvious (and only) difference I see in the JPG-captured set is the significantly increased sharpness — over-sharpening. This creates halos and increases noise levels.

Three sets of with-noise-reduction JPG results are included, illustrating the difference that noise-reduction processing makes. That difference can be big in some images, but the tradeoff is in the destruction of image details and reduced sharpness. I typically use no noise reduction for low ISO-captured images and a low amount for higher ISO-captured images. As with the amount of sharpness, you can adjust noise reduction to your personal preference. Noise reduction is available in-camera or during post-processing. Multi-Shot NR is again available in the R100.

Six sets of the R100 noise results were captured at full stop intervals between -3 EV and +3 EV. These RAW-format images were very significantly under and over-exposed, then adjusted to the proper brightness in Canon Digital Photo Professional (downloadable software included with the camera) and are useful for evaluating image quality, including the system's exposure latitude/dynamic range.

Overall, based on the predecessor similarity and field experience, this camera delivers the excellent image quality expected from a Canon APS-C imaging sensor.

File Size and Media

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The following table shows comparative RAW file sizes for a photo of a standard in-studio setup featuring a moderately-high amount of detail. The R100 numbers are based on M50 results.

Model / File Size in MB @ ISO:	(MP)	100	200	400	800	1600	3200	6400	12800	25600	51200	102400	204800
Canon EOS R6 II	(24.2)	28.7	29.4	30.2	31.1	32.1	33.3	34.5	36.2	38.2	40.3	43.0	43.2
Canon EOS R6 II CRAW	(24.2)	16.2	16.7	17.3	18.0	18.8	19.7	19.8	19.3	19.0	18.8	19.4	17.8
Canon EOS R7	(32.5)	40.0	40.1	41.3	42.6	44.3	46.0	48.0	50.3	52.6	55.0
Canon EOS R7 CRAW	(32.5)	21.5	22.5	23.5	24.7	26.3	27.9	28.4	27.9	27.5	27.0
Canon EOS R8	(24.2)	28.7	29.4	30.2	31.1	32.1	33.3	34.5	36.2	38.2	40.3	43.0	43.2
Canon EOS R8 CRAW	(24.2)	16.2	16.7	17.3	18.0	18.8	19.7	19.8	19.3	19.0	18.8	19.4	17.8
Canon EOS R10	(24.2)	29.0	29.8	30.8	31.8	33.3	34.9	36.0	37.7	39.7	41.8
Canon EOS R10 CRAW	(24.2)	16.5	17.0	17.8	18.7	19.9	21.4	21.3	20.8	20.7	20.7
Canon EOS R50 *	(24.2)	29.0	29.8	30.8	31.8	33.3	34.9	36.0	37.7	39.7	41.8
Canon EOS R50 CRAW *	(24.2)	16.5	17.0	17.8	18.7	19.9	21.4	21.3	20.8	20.7	20.7
Canon EOS R100 *	(24.1)	30.4	31.3	32.4	33.7	35.3	37.0	38.9	40.6	43.2	45.9
Canon EOS R	(30.4)	35.8	36.6	37.6	38.7	40.0	41.8	43.3	45.7	48.0	49.6*	**	**
Canon EOS R CRAW	(30.4)	23.1	23.5	24.5	25.2	26.5	28.0	29.4	31.6	33.8	49.6*	35.3*	**
Canon EOS RP	(26.2)	30.7	31.3	32.0	32.8	34.0	35.5	37.1	39.0	41.5	43.4	45.8
Canon EOS M6 Mark II	(32.5)	38.6	39.9	40.8	42.5	44.5	46.7	49.1	51.6	54.2	57.4
Canon EOS M6 Mark II CRAW	(32.5)	24.6	25.6	26.3	27.8	31.7	29.7	31.7	34.0	36.4	42.1
Canon EOS M50 Mark II	(24.1)	30.4	31.3	32.4	33.7	35.3	37.0	38.9	40.6	43.2	45.9
Canon EOS M200	(24.1)	29.4	30.2	31.4	32.7	34.2	35.9	37.8	39.5	42.1	44.7

C-RAW is a RAW data format created with lossy compression vs. the normal non-lossy compressed RAW format. C-RAW provides full RAW file support along with an approximately 40% file size reduction over Canon's already efficiently compressed RAW file format size. The saved space adds up quickly, significantly impacting memory card and hard disk storage capacity requirements. Check out the article Should I Use Canon's C-RAW Image File Format? for more information.

The R100 has a single SD/SDHC/SDXC (UHS-I) memory card slot, aiding in the compact size, light weight, and low-cost principles.

The bottom of the camera-located card slot shares an access door with the battery. While this location is less convenient than a dedicated side-of-the-camera slot access door, space and cost savings are realized by this design.

This slot features a label facing toward the front of the camera orientation. Also, note that this door's latch is not spring-loaded — it must be manually locked closed.

This camera formats memory cards quickly.

In-Body Image Stabilization (IBIS)

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In this case, achieving the target light weight, small size, and low-cost required foregoing in-camera image stabilization.

Still, a high percentage of RF lenses feature image stabilization.

Frame Rate, Buffer Depth, Shutter

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There are cameras designed to capture sports and other fast-action subjects. This is not that camera, though the R100 can still be used for such.

The Canon EOS R100 can capture continuous images at a rate of up to 6.5 fps, a modest speed, using the first curtain electronic shutter. Unfortunately, most action logically requiring a fast continuous frame rate is moving and thus, requires AF tracking. With continuous AF, the capture rate drops to a very slow 3.5 fps.

These are up-to rates, with battery power level, lens model, temperature, shutter speeds, etc., potentially affecting the realized rate. Continuous shooting is not provided with the full electronic shutter (only selectable as a Special Scene mode with limited features, including full auto exposure only), and a full mechanical shutter is not provided.

This camera does not feature RAW burst mode or Pre-Shooting.

RAW files feature 14-bit A/D conversion with the electronic 1st curtain shutter, and 12-bit A/D conversion is provided with the full electronic shutter. Is dropping to 12-bit a problem? Beyond the psychological difference, the image quality difference will seldom be noticed in ideally exposed images. Reduced quality will show primarily in smooth gradients, such as the sky, when contrast is adjusted, and noise levels may increase in brightened images, primarily in the shadows.

Model	FPS	Max JPG	Max RAW	Shutter Lag	VF Blackout
Canon EOS Rebel T8i / 850D	7.0/7.5	170/Full	40
Canon EOS Rebel SL3 / 250D	5.0	Full	10	75ms
Canon EOS Rebel T7 / 2000D	3.0	1110	6	120ms	170ms
Canon EOS R5	12/20	350	87/180	50ms	n/a
Canon EOS R6 Mark II	12/40	1,000+	110	50-84ms	n/a
Canon EOS R6	12/20	1,000+	240		n/a
Canon EOS R7	15/30	224/126	51/42	50-99ms	n/a
Canon EOS R8	6/40	1000+/120	1000+/56
Canon EOS R10	15/23	460/70	29/21	50-100ms	n/a
Canon EOS R50	12/15	42/28	7
Canon EOS R100	6.5 (3.5)	100	6
Canon EOS R	2.2-8	100	34/47	50ms	n/a
Canon EOS RP	4	Full	50/Full	55ms	n/a
Canon EOS M6 Mark II	14/30	54	23	53ms	n/a
Canon EOS M50 Mark II	7.4/10	33/47	10		n/a
Canon EOS M200	4/6.1	1120	13		n/a

Buffer depth is also not a strength of this camera. The fast RAM used for buffering images in camera is expensive, and certain is that the R100's reduced internal memory lowers its cost — and buffer depth.

At 6.5 fps, the 6-frame RAW buffer will be filled in about a second. Capturing peak action within that second often requires careful timing of the shutter release press.

If continuous shooting is required, AF is likely also required. Shooting at 3.5 fps will allow a longer shooting period before filling the buffer. My test delivered 18 images, for a reasonable duration.

If a longer continuous burst is required, JPG image capture is the option, permitting about 100 shots at the specified framerate.

Note that AE and WB are fixed after the first shot when continuous shooting is enabled.

As mentioned, the R100 avails the full electronic shutter only in Silent mode and limits the exposure mode to full auto. Only in this mode do we realize the effects of the slow 78ms sensor readout speed.

Model (times in ms)	Electronic	1st Curtain Mechanical
Canon EOS R5	16.3	3.5
Canon EOS R6 Mark II	14.5	3.4
Canon EOS R7	29.2	2.4
Canon EOS R8	14.5	3.4
Canon EOS R10	35.0	2.8
Canon EOS R50	35.3	2.4
Canon EOS R100	78	2.4

The R100 does not feel as responsive as Canon's higher-end models.

The R100's shutter speed range is 30-1/4000 sec. in 1/3 stop increments, plus Bulb. Note that, as with the R50, 1/2-stop adjustments are not available (I never use them).

Flash X-Sync is 1/250 sec. Flash exposure compensation is +/- 2 stops in 1/3-stop increments.

The EOS R100 does not feature built-in Intervalometer (interval timer) or bulb timer functionality.

Autofocus

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Getting great images requires high-precision focusing, and Canon has continuously provided best-in-class AF systems. The R100 does not feature the absolute latest Canon AF technology, but it still has a high-performance Dual Pixel CMOS implementation that frees the photographer to focus on composition and shutter release timing.

People face and eye detection are featured, but animals, vehicles, and other subjects are not specified in the algorithm.

The EOS R100's AF system offers Face+Tracking AF (up to 143 points available for automatic selection, 99 for video), Spot AF (3,975 available positions for stills, 3,375 for Movies), 1-point AF, and Zone AF.

AF coverage is substantial but limited relative to higher-end R series cameras and not 100% x 100%. Those coming from a DSLR will find the ability to maintain continuous focus with a point in the R100's image periphery game-changing.

With no joystick and no touch and drag AF, manually selecting an AF point among the extreme number available becomes challenging, including lots of button pressing/holding. Canon assists with this challenge by providing rapid movement of the AF point when the selection button is pressed. Most entry-level camera users will rely on AF, and for them, this issue is irrelevant.

The R100 can auto focus at EV -4.0 – 18 (at 23°C & ISO 100) and EV -2 - 18 for movies. While these numbers are not as impressive as those of its higher-priced siblings, EV -4 is still quite dark, and that performance is without aid from the AF assist lamp.

Located on the camera's left side is a bright LED focus assist lamp that extends AF capabilities into complete darkness within its very good range. The focus assist lamp may be blocked by the hand holding the camera in a normal shooting position. As a lens hood can partially block this light, hood removal is sometimes optimal depending on the focus point selected and the amount of reflected assist light available for the selected point.

The R100 focuses quite fast, and this advanced AF system is suitable for casual and even more advanced pursuits.

Most review-time-current sensor-based AF systems do not provide cross-sensitive AF point technology. As a result, the R100 camera may struggle to focus on only perfectly horizontally oriented lines of contrast. That said, I don't often encounter this issue with any R-series cameras, and rolling the camera slightly until focused will usually resolve AF lock-on issues.

With imaging sensor-based AF, expect this camera to focus consistently accurately, even with third-party lenses. Using the imaging sensor for AF enables mirrorless feature advantages such as precise eye tracking — a DSLR will rarely focus on an eye behind obstructions, but this camera can.

Canon's latest AF systems are outstanding performers, reason alone to upgrade to a mirrorless camera from a DSLR.

Movies

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The R100 features uncropped movies up to 4K UHD 24 fps (cropped), and FHD 60 fps (uncropped).

Canon EOS R100 Movie Specifications:
Container Format: MP4
Bit depth: 8 bit
Compression: H.264 / MPEG-4
Color Sampling Method: YCbCr 4:2:0
Color Gamut: Rec.709
Audio: AAC

Movie sizes are:
4K UHD (16:9) 3840 x 2160 (23.98fps) inter frame (IPB)
Full HD (16:9) 1920 x 1080 (59.94, 29.97, 23.98fps) inter frame (IPB)
High Frame Rate 1280 x 720 (119.88, 100 fps) inter frame (IPB), No audio
Time-lapse 3840 x 2160, 1920 x 1080 (29.97, 25 fps) All-I, No audio
Miniature Effect 1920 x 1080 (29.97, 25, 23.98 fps) inter frame (IPB), No audio

Canon Log and HDR features are not available. The max recording duration is 29min 59sec. Prerecording is supported.

Dual Pixel CMOS AF is available in movie mode, though 4K video only supports contrast-detection AF — not the higher-performing phase-detection AF. 5-axis Movie Digital IS aims to steady video recording (a crop of the imaging sensor makes feature this possible).

A video and stills switch is not provided.

The R50's video quality is excellent for this price point.

Exposure/Metering System

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The EOS R100's high-performing metering system features 384 zones (24x16), and the metering range specification is good: EV -2 – 20 (at 23°C, ISO100, with evaluative metering) for stills and EV 0 - 20 for movies.

EOS R100's metering modes include Evaluative metering (full area), Partial metering (approx. 5.8% of the area at the center of the screen), Spot metering (approx. 2.9% of the area at the center of the screen), and Center-weighted average metering. Exposure compensation is +/-3 stops in 1/3-stop (but not 1/2-stop) increments. AEB (Auto Exposure Bracketing) is +/-2 stops in 1/3-stop increments for 3 shots (only).

All of Canon's current metering systems are quite reliable. While I still use manual mode 95% of the time, I rely on the camera's metering via Auto ISO a significant percentage of the time.

Canon's Anti-flicker mode is not featured in the R100.

Viewfinder and LCD

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The EOS R100 has a compact 0.39" (9.9mm) OLED (Organic Light-Emitting Diode) EVF (Electronic Viewfinder), with an appropriate 2.36 million dot resolution and a 60 fps refresh rate.

The R100 EVF features a 100% view and 0.95x magnification, and this EVF has good contrast and color. The eyepoint spec is 22mm, and the dioptric adjustment of -3 to +1 facilitates viewfinder use without glasses. OVF simulation is not available.

An EVF makes a configurable vast amount of information available for display and makes that information rotatable, ideal for shooting in vertical orientation. A quality EVF makes reviewing images easy, especially when zooming in for sharpness verification, especially in bright daylight, and especially for eyes that otherwise require corrective optics (if you don't need glasses now, expect to need them at some point).

A feature I heavily rely on is an electronic level, and all full-functioned current-design cameras have this feature. Unfortunately, the R100 does not.

The EOS R100 features a 3" (7.50cm) LCD, featuring a relatively low approx. 1,040K dots. This display does not have the Touchscreen feature I've grown accustomed to and miss on this camera, and this is not a Vari-angle LCD ideal for self-recording.

While this is not Canon's highest-resolution LCD display, the image quality is good.

Anti-smudge coating is not applied, making this LCD modestly more difficult to clean than coated models. Anti-reflection coating is also not applied.

The LCD choice for the R100 was a result of cost-cutting, but it nicely gets the job done.

Physical Design

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The R100 features a basic set of controls, perhaps more than expected on such an inexpensive camera but less than a serious amateur would prefer to have available.

While the provided controls are logically located, Canon constantly changes options and positions. Those with one camera benefit from the ongoing refinement, while those of us constantly using different models require a bit of acclimation. Those migrating to the EOS R series from a DSLR will require some acclimation, but the benefits are worth the effort.

As you view the R100, keep in mind that 7 buttons are customizable, usually to a small set of alternative functions:

• Shutter button
• Exposure compensation button
• AE lock button
• ISO speed setting button
• Flash button
• Movie shooting button
• Drive mode button

Visually compare the Canon EOS R100 with many other camera models using the site's camera product image comparison tool.

Back of the Camera

The R100's back-of-the-camera features are somewhat limited compared to the higher-end models. Advanced photographers will, minimally, wish for a joystick and a rear control dial surrounding the cross keys.

The provided 4-way cross keys controller, similar to that on the R50, works well and is easy to use.

The Set button, located in the center of the cross keys, acts as the "Q" Quick control button in shooting mode, making commonly used features readily available. Note that pressing the Menu button does not wake the camera (Playback and Info do).

Note that, in M mode, pressing the up cross key toggles the top dial's adjustment function between shutter speed and aperture.

I often complain that Canon R-series cameras' flush-mounted buttons are hard to tactilely locate and press, especially when wearing gloves, and I again complain that the R100 has this issue. The buttons need distinguishable plastic depth changes around them.

The fixed-position LCD is smoothly embedded into the rear of the camera.

The back view shows the compact viewfinder aiding the R100's small dimensions. The diopter adjustment is under the viewfinder and awkward to use.

Top of the Camera

The power switch is on the right side where it is accessible by the camera gripping hand.

Obvious from the top view is that the viewfinder provides adequate nose relief from the LCD, and the conventional hot shoe (not a Multi-function shoe) is seen on top.

Next to the right of the viewfinder is the mode dial. Currently, the R-series models without a top LCD have a dedicated mode dial. This dial is prominently featured for easy right-thumb access, and with a non-locking design, mode changes are a quick swipe of the thumb away, even when the camera is powered off. The mode dial and other top-of-the-camera dials are raised only somewhat, protected from impact damage.

The R100's mode dial has 9 options, though some modes access many others.

The EOS R100 (and nearly all other EOS cameras) has a fully automatic point-and-shoot mode. Complete beginners can open the box, charge and install the battery, insert a memory card, and select the A+ fully-automatic Scene Intelligent Auto mode to have a camera ready to go, taking care of everything for camera phone simplicity. This mode is simple from the user's perspective, but it is far from simple from a technological standpoint as it uses powerful artificial intelligence algorithms to deliver excellent results in various situations.

Included modes are Canon's standard P (Program), Av (Aperture Priority), Tv (Shutter Priority), and M (manual). Missing on the dial are Fv, Bulb (though this mode is still available via a shutter speed setting in M mode), and Custom modes.

Also included on this dial are Movie, Hybrid Auto (captures a movie 2-4 seconds before the photo is taken, like the older Movie Digest Scene modes that captured video and stills together), SCN (Special Scene Mode), and Creative Filters. SCN contains the creative modes, including Portrait, Group, Landscape, Panoramic Shot (new), Sports, Panning, Close-up, Food, Night Portrait, Handheld Night Scene, HDR Backlight Control, and Silent ("Kids" went missing from the R50's options set).

Creative Filters include Grainy B/W, Soft focus, Fish-eye effect, Water painting effect, Toy camera effect, Miniature effect, HDR art standard, HDR art vivid, HDR art bold, and HDR art embossed.

Toward the top of the right side are the shutter release and top dial, features very similar in function and orientation as Canon's other EOS DSLRs and MILCs.

Canon's common M-Fn button and top Quick Control dial are missing on the R100's top. The R50's ISO button went missing, with a rear cross key button now initiating that setting change.

The red Movie shooting button provides logically positioned instant access to video recording.

Side of the Camera

External Microphone In (3.5mm Stereo mini jack) and E3 remote ports are provided on the left side of the camera.

USB 2.0 (Type-C) and HDMI Micro out (Type D, HDMI-CEC not supported) ports are available on the right side of the camera.

Notably missing is a headphone port.

Front of the Camera

The front of the R100 features only the basics, including the lens release button, AF assist lamp, and brand markings.

Size of the Camera

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A hallmark of mirrorless interchangeable lens cameras is their small size, and this one is tiny. Small size is reason alone to reach for the R100.

When looking for an opportunity to save space in camera design, the grip, typically dimensionally protruding more than any other physical feature, is an easy target. However, if one spends much time with a camera in hand, grip ergonomics are critically important and a too-small grip becomes, quite literally, a pain.

The R100's grip size was obviously sacrificed to reduce the camera size, but Canon's engineers provided a good compromise. While my pinky does not fit on this grip, it is still quite usable and comfortable. For control purposes, small and light lenses are optimal.

Model	Body Dimensions		CIPA Weight
Canon EOS Rebel T8i / 850D	5.2 x 4.0 x 3.0	(131.0 x 102.6 x 76.2mm)	18.2 oz (515g)
Canon EOS Rebel SL3 / 250D	4.8 x 3.6 x 2.7	(122.4 x 92.6 x 69.8mm)	15.8 oz (449g)
Canon EOS Rebel T7 / 2000D	5.1 x 4.0 x 3.1"	(129.0 x 101.3 x 77.6mm)	16.8 oz (475g)
Canon EOS R5	5.5 x 3.8 x 3.5"	(138.0 x 97.5 x 88.0mm)	26.0 oz (738g)
Canon EOS R6 Mark II	5.5 x 3.9 x 3.5"	(138.4 x 98.4 x 88.4mm)	23.6 oz (670g)
Canon EOS R6	5.5 x 3.8 x 3.5"	(138.0 x 97.5 x 88.4mm)	24.0 oz (680g)
Canon EOS R7	5.2 x 3.6 x 3.6"	(132.0 x 90.4 x 91.7mm)	21.6 oz (612g)
Canon EOS R8	5.2 x 3.4 x 2.8"	(132.5 x 86.1 x 70.0mm)	16.2 oz. (461g)
Canon EOS R10	4.8 x 3.5 x 3.3"	(122.5 x 87.8 x 83.4mm)	15.1 oz (429g)
Canon EOS R50	4.6 x 3.4 x 2.7"	(116.3 x 85.5 x 68.8mm)	13.3 oz. (375g)
Canon EOS R100	4.6 x 3.4 x 2.7"	(116.3 x 85.5 x 68.8mm)	12.6 oz. (356g)
Canon EOS R	5.4 x 3.9 x 3.3"	(135.8 x 98.3 x 84.4mm)	23.4 oz (660g)
Canon EOS RP	5.2 x 3.4 x 2.8"	(132.5 x 85.3 x 70mm)	17.3 oz (485g)
Canon EOS M6 Mark II	4.7 x 2.8 x 1.9"	(119.6 x 70.0 x 49.2mm)	14.4 oz (408g)
Canon EOS M50 Mark II	4.6 x 3.5 x 2.3"	(116.3 x 88.1 x 58.7mm)	13.7 oz (387g)
Canon EOS M200	4.3 x 2.6 x 1.4"	(108.2 x 67.1 x 35.1mm)	11.3 oz (320g)

That Canon's engineers brought the R100's weight under that of the M50 II and its smaller lens mount, is especially remarkable. The R100 is considerably smaller and noticeably lighter than Canon's smallest DSLR, the Rebel SL3.

This camera's small size and light weight make it a perfect take-everywhere companion. The R100 and a small RF-S lens fit vertically in the space a mid-sized lens alone normally consumes in my backpack.

Build Quality

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All models in the entire current Canon EOS line (and most discontinued models as well) feature very nice build quality, and even the least expensive models appear this way. Construction is always tight with dials and buttons assuredly clicking affirmation of use.

This camera utilizes polycarbonate resin with glass fiber and aluminum alloy for the structure.

As usual for EOS models, Canon has ergonomically rounded most of the camera, and especially the areas intended to be gripped are void of sharp corners. Unless the retro look is what you prefer, you will likely find this design aesthetically pleasing.

The EOS R100 does not have specified weather resistance.

Additional Features

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Wireless LAN (IEEE802.11b/g/n) (2.4 GHz) and Bluetooth 4.2 support are provided. Connect the camera to EOS Utility or a Smartphone.

Easily transfer images and movies to compatible mobile devices (and then to social media) using Canon's free Camera Connect app (iOS | Android). This app provides some remote control of the camera's settings and shutter when shooting still images. Wireless remote printing to a compatible printer is also supported via Wi-Fi.

Utilizing this camera's Bluetooth capability is the Canon BR-E1 Bluetooth Remote. Want to be part of your own family picture? Or just don't want to deal with a remote release cord when using a tripod? This is an accessory you may want.

The Canon HG-100TBR Tripod Grip and RS-60E3 Remote Switch are two more useful compatible accessories.

The R100 does not have a self-cleaning sensor. A battery grip is not available.

Flash

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The Canon EOS R100 has a built-in flash.

Manually raise the flash housed in the front of the viewfinder box when this feature is desired. The pop-up flash is not powerful, but it is especially useful for fill light.

The R100 does not feature "Master" or "Sender" optical wireless capabilities (without an accessory).

Battery

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Batteries are dense, and creating a small, light, and affordable camera requires a small battery. Logically, Canon again used the Canon LP-E17 Battery for the R100. Great is that many EOS camera models utilize the same battery. Not as great is that a small battery size equates to reduced capacity.

The R100's battery life rating:

Stills: EVF – 340 shots (no flash), 320 shots (50% built-in flash)
LCD – 430 shots (no flash), 400 shots (50% built-in flash) (power saving), 320 shots (smooth)
Bulb – 3 hours 20 minutes

Video: 4K, 24p – approx. 1 hour 50 min., Full HD, 30p – approx. 2 hours 40 min.

While the R100 has an underwhelming battery life rating, those numbers are not bad for the size of this camera, real-life experience usually yields considerably higher shot counts, and casual photographers often do not approach these quantities during an outing.

This tiny battery takes up very little space in the camera bag or your pocket, and it is advisable to always have at least one spare along.

The EOS R100 provides a 4-level battery indicator.

Also compatible and power-related are the AC Adapter AC-E6N, AC Adapter Kit ACK-E18, and DC Coupler DR-E18.

The R100 does not support USB charging, including with the Canon USB Power Adapter PD-E1.

What is the Best Lens for the Canon EOS R100?

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A lens can make a big difference in a camera's overall performance and resulting image quality, and the continuously growing, directly compatible Canon RF Lens lineup is impressive.

The EOS R100 is available in black (only) in a body-only kit, in a kit with the Canon RF-S 18-45mm F4.5-6.3 IS STM Lens, or in a 2-lens kit that adds the Canon RF-S 55-210mm F5-7.1 IS STM Lens.

The RF-S 18-45mm lens available in the kit is ideally paired with the compact, lightweight, and inexpensive EOS R100.

Those wishing for a longer zoom range should consider the Canon RF-S 18-150mm F3.5-6.3 IS STM Lens.

While the R100 is not my first choice for professional use, it is able to utilize the superior image quality produced by Canon's professional-grade lenses. For the R100, my pro standard zoom lens choice would be the Canon RF 15-35mm F2.8 L IS USM Lens, Canon RF 24-70mm F2.8 L IS USM Lens, or Canon RF 24-105mm F4 L IS USM Lens. These lenses offer ideal general-purpose focal length ranges, wide apertures, image stabilization, a high-performing AF system, professional-grade build quality, and excellent image quality. However, none is compact or inexpensive like the R100, and all are somewhat challenging to hold with the R100's small grip.

Via one of the Canon Mount Adapter EF-EOS Rs, ranging from relatively low to rather high-priced, Canon EF, EF-S, TS-E, and MP-E lenses become compatible. These adapted lenses perform as native (perhaps with even better focus accuracy). Note that the R100 is not compatible with the Control Ring on the adapter with that feature.

Canon's EF-M lenses are not compatible with the RF mount, even with the adapter, and because of their shorter flange back distance (18mm vs. 20mm), it is unlikely that we will see a Canon option to support this combination.

Next, minimally add a telephoto zoom lens to the kit. The Canon RF-S 55-210mm F5-7.1 IS STM Lens and Canon RF 100-400mm F5.6-8 IS USM Lens are a nice match to the R100, and the far heavier and more expensive Canon RF 70-200mm F2.8 L IS USM Lens and Canon RF 100-500mm F4.5-7.1 L IS USM Lens are outstanding choices for the ultimate image quality performance.

Two more incompatibilities you should be aware of are:

The Canon RF 1.4x Extender and Canon RF 2x Extender are not compatible, likely due to communications issues. The Canon EF 1.4x III Extender and Canon EF 2x III Extender are compatible when used with the Mount Adaptor.

The Canon RF 5.2mm F2.8 L Dual Fisheye Lens (designed for full frame 8K recording, only the R5 and R5 C are officially supported at review time) and Canon RF 85mm F1.2 L USM DS Lens (a communication issue related to exposure metering at apertures wider than f/5.6?) are not compatible.

Price

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I didn't think we would see interchangeable lens cameras with a list price this low again. Kudos to Canon for pulling off this feat. This camera is a bargain for those requiring only basic features.

Wrap Up

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Keeping a review of the incredibly feature-laden Canon EOS R100 concise but complete is a difficult balance to find, and this review is not a complete description of every feature available. Canon published an intimidatingly long (663 pages) but well-designed owner's manual (a link to the manual is provided at the beginning of this review) that highlights all of the features found on this camera, explaining their use. Read the manual, use the camera, repeat.

Owning a Canon product gives you access to Canon support, and the support provided by Canon USA (minimally) is excellent. When I call for support, I get an intelligent person who sincerely wants to help me with my question or problem. Although I seldom need Canon repair service, it is fast and reliable.

The production Canon EOS R100 camera used for this review was online/retail sourced.

Alternatives

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Is the EOS R100 the right camera for you? Good Question. Let's make some comparisons.

A compact, lightweight, entry-level targeted camera with an ultra-low price begs the question: "What is missing?" Or, "Where did the $200.00 go?" Comparing the R100 to the next model up, the Canon EOS R50, helps to clear those answers.

The Canon EOS R100 is shown to the left of the R50 below.

Check out the EOS R100 vs. R50 specification comparison, along with the visual comparison of these cameras.

What are the differences between the Canon EOS R100 and the R50? Here are the R50's advantages:

• 24.2 MP vs. 24.1 MP (the resolution difference is not noticeable, but the R50 has a newer imaging sensor)
• DIGIC X vs. DIGIC 8 and operating system port from M50 and M50 II
• More advanced AF area selection and subject detection
• Touch and Drag AF area selection
• Focus Bracketing
• Light Flicker avoidance mode
• Exposure compensation of +/-3 stops in 1/3- or 1/2-stop increments vs. +/- 2 EV in 1/3-stop increments
• ISO 100-32000, H (51200) vs. 100–12800, H (25600)
• Up 1/8000 sec. shutter in 1/2 or 1/3 stop increments vs. up to 1/4000 in 1/3 stop increments
• Full-featured electronic shutter mode with 35.3 ms readout vs. limited silent shooting mode (full auto only) with 78 ms readout
• Vari-angle touch screen Clear View LCD II with approx. 1.62 million dots vs. 1,040,000 dots. (not Vari-Angle or Touchscreen)
• Flash Exposure Compensation (FEC) of +/- 3EV vs. +/- 2EV
• Multi-function Shoe vs. Conventional Hot Shoe
• 2s+remote, 10s+remote shooting modes
• 12 fps 1st curtain electronic shutter continuous shooting with AF vs. 3.5
• 15 fps electronic shutter continuous shooting with AF vs. n/a
• HEIF, HDR PQ, HEVC
• 4K UHD 30 fps (uncropped, 6K oversampling, 10-bit) vs. 4K UHD 24 fps (cropped, 8-bit)
• FHD 120 fps vs. 60 fps
• Max movie duration 1:00 vs. 29:59
• Has an ISO button on top
• Has an electronic level
• Selectable Control Ring functionality vs. exposure compensation only
• Compatible with Control Ring on mount adapter
• Compatible with Canon USB Power Adapter PD-E1
• Compatible with the Canon RF 1.4x and 2x Extenders, RF 85mm F1.2 L USM DS Lens

What are the R100's advantages?

• E3 Remote Release Port
• Slightly Lighter: 12.6 vs. 13.2 oz (356 vs. 375g)
• Considerably less expensive

While the R50 holds most of the advantages, and some of them are compelling, the lower price line item on the R100's list holds significant weight.

It is always interesting to compare a camera to its predecessor, and the Canon EOS M50 Mark II gets that distinction for the R100. The R100 is to the left of the M50 II below.

Here is the EOS R100 vs. M50 Mark II specification comparison. Also available is the visual comparison of these cameras.

What are the differences between the Canon EOS R100 and the M50 II? Here are the R100's advantages:

• RF mount and compatibility with RF lenses
• 3 years newer (but same imaging sensor and processing engine, ported OS)
• Built-in flash rated to 6 GN vs. 5
• USB Type-C vs. Micro-B
• LP-E17 Battery vs. LP-E12, 320 shots vs. 250 (EVF), 400 vs. 305 (LCD)
• Slightly smaller: 4.6 × 3.4 × 2.7" vs. 4.6 x 3.5 x 2.3" (116.3 x 85.5 x 68.8mm vs. 116.3 x 88.1 x 58.7mm)
• Slightly lighter: 12.6 vs. 13.7 oz (356 vs. 387g)
• Noticeably less expensive

Here are the M50 II's advantages:

• Vari-Angle, Touchscreen LCD
• Has Touch and Drag AF
• 10 fps without AF for up 10 RAW images vs. 6.5 fps for 6 fps
• 7.4 fps with AF vs. 3.5 fps
• Compatibility with EF-M lenses (small number of options)

Mostly, the R100 is the M50 II updated with an RF mount. Some continuous shooting speed and the Vari-Angle touchscreen were omitted, but the R100 is less expensive.

Let's compare the R100 to the least expensive current Canon DSLR, the EOS Rebel T7 (2000D).

The Canon EOS Rebel T7 / 2000D is shown behind the R100 below.

Here is the EOS R100 vs. Rebel T7 specification comparison. Also view the visual comparison of these cameras.

What are the differences between the Canon EOS R100 and the Rebel T7? Here are the R100 advantages:

• Electronic Viewfinder with far more information available and 100% coverage vs. 95%
• 0.95x Viewfinder Magnification vs. 0.80x
• 7 years newer
• DIGIC 8 vs. DIGIC 4+
• 3,975 AF points vs. 9
• AF working range of EV -4 – 20 vs. EV 0 – 18 (center point only, EV 1 – 18 for other 8)
• Face and Eye Detection and Tracking
• 384 Zone Metering vs. 63
• Metering to EV -2 – 20 vs. EV 1 – 20
• ISO 100–12800 (in 1/3- or 1-stop increments), H (25600) vs. 100–6400 (in 1-stop increments), H (12800)
• LCD with 1,040,000 dots vs. 920,000
• 1/250 X-Sync vs. 1/200
• Lens Aberration Correction
• Continuous Shooting with AF at 3.5 fps vs. 3.0 for 6 RAW images vs. 11
• C-RAW format
• Bluetooth
• Smaller: 4.6 × 3.4 × 2.7" vs. 5.1 x 4.0 x 3.1" (116.3 x 85.5 x 68.8mm vs. 129.0 x 101.3 x 77.6mm)
• Lighter: 12.6 vs. 16.75 oz (356 vs. 475g)

Here are the Rebel T7 advantages:

• Optical Viewfinder with instant response
• One additional button plus a Flash button
• Exposure Compensation of +/-5 EV in 1/3 or 1/2 stop increments vs. +/-3 EV in 1/3 stop increments
• Has 1/2-stop shutter speed increments available
• Built-in flash rated to 9 GN vs. 6
• NFC
• Battery rated to 500 shots (CIPA) vs. 320 with EVF
• Noticeably less expensive

I would find it difficult to go back to the limitations of a DSLR. Still, those with an extremely limited budget may find the T7 to be the right camera for them.

Summary

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"The Canon EOS R100 camera was designed for new, first-time mirrorless camera or existing interchangeable lens camera users who previously enjoyed EOS Rebel or EOS M cameras." [Canon USA] I'll add that the R100 is a great option for kids and even for professionals when the camera stands a likelihood of being damaged during a shoot (disposable).

In the EOS R50 review, I said "There are a lot of numbers higher than 50, and if ultimate simplicity is a goal, there seems to be an opportunity for an even less-featured model, such as an EOS R100."

That camera is now here. Not all photo scenarios require exceptional camera capabilities, and not all photographers want to spend time learning how to use the advanced features of a camera.

The Canon EOS R100 features strong AF performance, excellent image quality, a compact size, light weight, and a surprisingly low price. There is a lot to like about this camera.