Sigma 30mm F1.4 DC DN Contemporary Lens Review

Sigma 30mm F1.4 DC DN Contemporary Lens
In-Depth Review

The Sigma 30mm F1.4 DC DN Contemporary Lens is being reviewed alongside the Sigma 56mm F1.4 DC DN Contemporary Lens and a couple of other Sigma lenses. These lenses share the advantages of a smaller image circle, including reduced cost, decreased size, and a lower price. The APS-C format Sigma 30mm F1.4 DC DN Contemporary Lens features those attributes while still providing an ultra-wide aperture and good image quality. This is an attractively designed lens with a highly-valued normal focal length.

APS-C camera owners (and full-frame camera owners willing to accept a smaller image circle) looking for a high-quality general-purpose prime lens have a good option to consider in the affordable Sigma 30mm F1.4 DC DN Contemporary, a top-selling APS-C prime lens.

Sigma 30mm F1.4 DC DN Contemporary Lens Top View

Focal Length

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The focal length is always a primary consideration when selecting the ideal lens for a particular use. The focal length determines the angle of view, which determines the subject distance required, with perspective determined by that distance.

For those of us who work in full-frame angles of view, this lens provides a 45mm (Sony 1.5x field of view crop factor calculation) full-frame angle of view equivalent.

The APS-C 30mm, full-frame 45mm angle of view provides a natural appearance to compositions, and that aspect brings great general-purpose usefulness.

Modestly wider than the ultra-popular full-frame 50mm focal length, the 45mm full-frame-equivalent focal length is useful for similar purposes. These uses include fashion, portraiture, weddings, documentaries, street, lifestyle, sports, architecture, landscape, commercial, around-the-home, and general studio photography applications, including product photography.

As you likely noted, many good applications for this lens include people as subjects. An APS-C 45mm lens (on a full-frame body) provides an angle of view too wide for tightly framed headshot portraits (a too-close perspective is required), but 45mm is an excellent choice for wider portrait framing, especially full-body portraits.

To visualize where 30mm fits among other common focal lengths, I'll borrow an example from the Tamron 35-150mm f/2-2.8 Di III VXD Lens review. The indicated focal lengths are converted to the APS-C equivalent angle of view.

Tamron 35-150mm f/2-2.8 Di III VXD Lens Focal Length Range Example

23mm | 30mm | 33mm | 43mm | 47mm | 57mm

This lens is a great choice for video needs covering the abovementioned subjects.

Sigma 30mm F1.4 DC DN Contemporary Lens Front View

Max Aperture

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Having an f/1.4 aperture is liberating when shooting in dark environments, and the background blur this aperture can create is differentiating for this focal length.

This lens's f/1.4 max aperture is nearly as wide as it gets for AF lenses near 30mm (full-frame 50mm f/1.2 options are available), though most major lens manufacturers offer 35 and 50mm lenses in f/1.4 aperture.

Use f/1.4 to allow a significant amount of light to reach the imaging sensor. Use that light to enable subject and camera motion stopping shutter speeds in low light levels with low ISO settings keeping noise levels down. It seems there is always enough light for handholding an f/1.4 lens.

Another advantage of a wide aperture lens is the background blur it can create. A 30mm lens set to f/1.4 with a close subject creates a shallow DOF, drawing the viewer's eye to the in-focus subject against a smoothly blurred background. The ability to blur the background adds artistic capabilities to this lens's list of highly-desired features.

The following examples show the maximum blur this Sigma lens can create at the respective aperture setting.

Sigma 30mm F1.4 DC DN Contemporary Lens Aperture Comparison Example

Here are two more f/1.4 samples:

Sigma 30mm F1.4 DC DN Contemporary Lens Maximum Blur Example

Sigma 30mm F1.4 DC DN Contemporary Lens Maximum Blur Example

If you are shooting under a full sun at f/1.4, you will likely need at least 1/8000 sec shutter speeds at ISO 100 to keep the exposure dark enough. Positive is that there is little action that a 1/8000 sec shutter speed cannot stop, but if the subject has bright or reflective colors, even a 1/8000 sec shutter speed might not be fast enough to avoid blown highlights. Optionally use ISO 50 if your camera provides this setting, though the dynamic range may be impacted. Better still is that some cameras have shutter speeds faster than 1/8000 available.

Using a neutral density filter is a good solution to retaining the use of f/1.4 under direct sunlight when the shutter limitation is exceeded. Stopping down (narrowing) the aperture is always an option for preventing an image from getting too bright, though stopping down negates the need for the wide f/1.4 aperture, and the subject-isolating shallow depth of field is lost.

Creating wide apertures requires larger, heavier lens elements that translate into larger, heavier, and more expensive lenses. Thanks to the smaller APS-C image circle requirement combined with this design, this lens is small, light, and reasonably priced.

For most photographers, the benefits of a wide max aperture prime lens far outweigh the drawbacks. Usually, no flash is required.

Sigma 30mm F1.4 DC DN Contemporary Lens on Tripod

Image Stabilization

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The Sigma 30mm F1.4 DC DN Contemporary Lens does not feature image stabilization. Omitting the optical stabilization system reduces the size, weight, complexity, and cost, and the ultra-wide f/1.4 aperture feature aptly handles many low-light scenarios. Still, image stabilization is a useful feature.

Sony addresses that omission with Steady Shot IBIS (In-Body Image Stabilization) in their Alpha cameras. In addition to reducing camera shake, the stabilized imaging sensor provides a still viewfinder image, enabling careful composition. Furthermore, sensor-based AF takes advantage of the stabilized view for improved accuracy.

With no IS switch on the lens, the camera menu must be used to enable or disable IBIS or check the current settings. This extra step is a slight impediment to working quickly, going from tripod mounted to handholding, for example.

At review time, Canon EOS M cameras do not offer the IBIS feature.

Sigma 30mm F1.4 DC DN Contemporary Lens Angle View

Image Quality

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How sharp is the Sigma 30mm F1.4 DC DN Contemporary Lens? Let's find out.

In the center of the frame, the Sigma 30mm F1.4 DC DN Contemporary Lens produces reasonable sharpness. Typically, lenses are not as sharp at their wide-open apertures as they are when stopped down one or two stops, and at f/2, this lens is really sharp.

Moving farther out on the image circle, where light rays are refracted to a stronger angle than in the center, lenses typically show decreased sharpness. This lens shows only a gradual decline, with stopped-down improvements mirroring the center of the frame benefit.

Taking the testing outdoors, we next look at a series of center of the frame 100% resolution crop examples. These images were captured in RAW format using a Sony Alpha 1 and processed in Capture One using the Natural Clarity method. The sharpening amount was set to only "30" on a 0-1000 scale. Note that images from most cameras require some level of sharpening, but too-high sharpness settings are destructive to image details and hide the deficiencies of a lens.

Sigma 30mm F1.4 DC DN Contemporary Lens Sharpness Comparison Example

1.4 | 2.0  1.4 | 2.0  1.4 | 2.0  1.4 | 2.0

The f/1.4 results are a touch soft, but the details are sharp at f/2. There was essential no sharpness improvement at f4, and none was needed.

Next, we'll look at a series of comparisons showing 100% resolution extreme top left corner crops captured and processed identically to the above center-of-the-frame images. The lens was manually focused in the corner of the frame to capture these images.

Sigma 30mm F1.4 DC DN Contemporary Lens Corner Sharpness Comparison Example

Samples taken from the outer extreme of the image circle, full-frame corners, can be counted on to show a lens's weakest performance, and these extreme corner results are a bit soft at f/1.4. By f/4, the corner performance is excellent.

Corner sharpness does not always matter, but it does matter for many disciplines, including landscape photography. When I'm photographing landscapes and architecture with corner sharpness being desired, I'm probably using f/8 or f/11 to obtain enough depth of field for in-focus corner details, and this lens works well for these purposes at these apertures. The corners are usually intentionally out of focus when shooting at wide apertures. Videos captured at typical wide-aspect ratios also avoid the use of corners.

This lens does not exhibit focus shift, the plane of sharp focus moving forward or backward as the aperture is narrowed (residual spherical aberration or RSA).

A lens, especially an ultra-wide aperture lens, can be expected to show peripheral shading when used at the widest aperture settings. This lens's just over 2-stops of shading at f/1.4 is noticeable but not especially strong. By f/2, the shading is reduced to just over 1 stop. Vignetting continues to decrease until f/4, where a minor quarter stop of shading remains in the extreme corners.

One-stop of shading is often used as the visibility number, though subject details provide a widely varying amount of vignetting discernibility. Vignetting is correctable during post-processing with increased noise in the brightened areas being the penalty, or it can be embraced, using the effect to draw the viewer's eye to the center of the frame. Study the pattern shown in our vignetting test tool to determine how your images will be affected.

Lateral (or transverse) CA (Chromatic Aberration) refers to the unequal magnification of all colors in the spectrum. Lateral CA shows as color fringing along lines of strong contrast running tangential (meridional, right angles to radii) with the mid and especially the periphery of the image circle showing the most significant amount as this is where the most significant difference in the magnification of wavelengths typically exists.

With the right lens profile and software, lateral CA is often easily correctable (often in the camera) by radially shifting the colors to coincide. However, it is always better to avoid this aberration in the first place.

Color misalignment can be seen in the site's image quality tool, but let's also look at a worst-case example. The image below is a 100% crop from the extreme top left corner of a Sony a1 frame showing diagonal black and white lines.

Sigma 30mm F1.4 DC DN Contemporary Lens Lateral Chromatic Aberration Example

We should only see black and white colors in this image, and this lens performs well in this regard.

A relatively common lens aberration is axial (longitudinal, bokeh) CA, which causes non-coinciding focal planes of the various wavelengths of light. More simply, different colors of light are focused to different depths. Spherical aberration along with spherochromatism, or a change in the amount of spherical aberration with respect to color (looks quite similar to axial chromatic aberration but is hazier) are other common lens aberrations to observe. Axial CA remains somewhat persistent when stopping down, with the color misalignment effect increasing with defocusing. The spherical aberration color halo shows little size change as the lens is defocused, and stopping down one to two stops generally removes this aberration.

In the real world, lens defects do not exist in isolation, with spherical aberration and spherochromatism generally found, at least to some degree, along with axial CA. These combine to create a less sharp, hazy-appearing image quality at the widest apertures.

The examples below look at the defocused specular highlights' fringing colors in the foreground vs. the background. The lens has introduced any fringing color differences from the neutrally-colored subjects.

Sigma 30mm F1.4 DC DN Contemporary Lens Spherical and Axial Aberration Example

Considerable color separation is shown in the wide-aperture test results.

Bright light reflecting off lens elements' surfaces may cause flare and ghosting, resulting in reduced contrast and sometimes interesting, usually destructive visual artifacts. The shape, intensity, and position of the flare effects in an image are variable, dependent on the position and nature of the light source (or sources), selected aperture, shape of the aperture blades, and quantity and quality of the lens elements and their coatings. Additionally, flare and ghosting can impact AF performance.

On this lens, "Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions." [Sigma] The low 9-element count is additionally helpful in this regard. This lens produced only minor flare effects even at narrow apertures in our standard sun in the corner of the frame flare test, an excellent performance.

Flare effects can be embraced or avoided, or removal can be attempted. Removal is sometimes challenging. Thus, high flare resistance is a welcomed trait of this lens.

Two lens aberrations are particularly evident in images of stars, mainly because bright points of light against a dark background make them easier to see. Coma occurs when light rays from a point of light spread out from that point instead of being refocused as a point on the sensor. Coma is absent in the center of the frame, gets worse toward the edges/corners, and generally appears as a comet-like or triangular tail of light which can be oriented either away from the center of the frame (external coma) or toward the center of the frame (internal coma). Coma clears as the aperture is narrowed. Astigmatism is seen as points of light spreading into a line, either sagittal (radiating from the center of the image) or meridional (tangential, perpendicular to sagittal). This aberration can produce stars appearing to have wings. Remember that Lateral CA is another aberration apparent in the corners.

The image below is a 100% crop taken from the top-left corner of a Sony Alpha 1 image captured at f/1.4.

Sigma 30mm F1.4 DC DN Contemporary Lens Coma

The corner stars are stretched and sporting wings. While these effects are not unusual, they are not perfect or ideal.

"To correct distortion, the lens takes advantage of the image correction capabilities of the mirrorless camera body, using the corrective power of the optical system to enhance sharpness." [Sigma] Indeed, this lens produces strong barrel distortion.

While we might think that, with a single focal length to design for, prime lens designers would choose to eliminate all geometric distortion, that is not the case, and this lens has moderate barrel distortion. With increasing frequency, manufacturers are relying on software over physical lens design to handle geometric distortion.

Most modern lenses have correction profiles available (including in-camera), and distortion can easily be removed using these. Still, geometric distortion correction requires stretching which is detrimental to image quality.

As seen earlier in the review, it is easy to illustrate the strongest blur a lens can create. Due to the infinite number of variables present among all available scenes, assessing the bokeh quality is considerably more challenging. Here are some f/8 (for diaphragm blade interaction) examples.

Sigma 30mm F1.4 DC DN Contemporary Lens Bokeh Example

f/8 | f/8 | f/8

The first example shows defocused highlights filled rather smoothly and shaped relatively round.

The second two examples show full images reduced in size and looking nice — normal.

Except for a small number of specialty lenses, the wide aperture bokeh in the frame's corner does not produce round defocused highlights, with these effects taking on a cat's eye shape due to a form of mechanical vignetting. If you look through a tube at an angle, similar to the light reaching the frame's corner, the shape is not round. That is the shape we're looking at here.

Sigma 30mm F1.4 DC DN Contemporary Lens Cat's Eye Bokeh Example

Noticeable truncation shows on the inside of the defocused highlights deep into the frame at f/1.4. As the aperture narrows, the entrance pupil size is reduced, and the mechanical vignetting absolves with the shapes becoming rounder.

A 9-blade count diaphragm will create 18-point sunstars (diffraction spikes) from point light sources captured with a narrow aperture. In general, the more a lens diaphragm is stopped down, the larger and better-shaped the sunstars tend to be. Wide aperture lenses tend to have an advantage in this regard, and this lens can produce attractive stars, as illustrated below.

Sigma 30mm F1.4 DC DN Contemporary Lens Sunstar Effect Example

The example above was captured at f/16.

Overall, this lens optically performs well. The sharpness is slightly lacking at f/1.4 (but looks great at f/2), there is strong color separation at wide apertures, and the geometric distortion is noticeable.

Sigma 30mm F1.4 DC DN Contemporary Lens Side View


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Driven by a stepping motor, the Sigma 30mm F1.4 DC DN Contemporary Lens smoothly autofocuses with fast speed. The focusing is internal and practically silent.

Remember that (at least some) cameras, including the Sony a1, defocus the image slightly before final focusing in AF-S mode, even if the subject was initially in focus, adding significantly to the focus lock time. Autofocus lock speed is noticeably faster in AF-C mode.

With adequate contrast on the subject, this lens focuses in dark environments, though perhaps not in light levels as low as I expected for an f/1.4 lens. Autofocusing becomes slow in the lowest functioning light levels.

I found this lens to mostly focus accurately, the number one requirement of an AF system. Not every shot was accurately focused, but most were.

Normal is for the scene to change size in the frame (sometimes significantly) as the focus is pulled from one extent to the other. This is focus breathing, a change in focal length resulting from a change in focus distance. Focus breathing impacts photographers intending to use focus stacking techniques, videographers pulling focus (without movement to camouflage the effect), and anyone critically framing while adjusting focus. This lens produces a big change in subject size through a full extent focus distance adjustment.

Sigma 30mm F1.4 DC DN Contemporary Lens Focus Breathing Example

This lens does not have an AF/MF switch. Changing this frequently used camera setting requires the use of the menu system (or a camera switch on some models).

This lens has a large, sharp-ribbed, rubberized focus ring that is easy to find. The ring rotates smoothly with ideal resistance.

The focus ring has a variable adjustment rate based on the rotation speed. A full extent focus distance change requires over four full rotations (1640°) if turning the focus ring slowly. Turn the ring fast, and 360° of rotation does the same.

The slow rotation manual focus adjustment steps are just short enough for high-precision focusing.

With a minimum focus distance of 11.8" (300mm), this lens has a 0.14x maximum magnification spec, a relatively low number overall.

The chart below includes a set of complementary Sigma lenses along with more-similar alternatives.

ModelMin Focus Distance "(mm)Max Magnification
Canon EF-M 28mm f/3.5 Macro IS STM Lens3.7(93)1.20x
Canon EF-M 32mm f/1.4 STM Lens9.1(230)0.25x
Sigma 16mm F1.4 DC DN Contemporary Lens9.8(250)0.10x
Sigma 30mm F1.4 DC DN Contemporary Lens11.8(300)0.14x
Sigma 30mm f/1.4 DC HSM Art Lens11.8(300)0.15x
Sigma 35mm F2 DG DN Contemporary Lens10.6(270)0.18x
Sigma 56mm F1.4 DC DN Contemporary Lens19.7(500)0.14x
Sigma 18-50mm F2.8 DC DN Contemporary Lens4.8(121)0.36x

A subject measuring approximately 5.3" x 3.5" (135 x 90mm) fills a full-frame imaging sensor at this lens's minimum focus distance.

Sigma 30mm F1.4 DC DN Contemporary Lens Maximum Magnification Example

The USPS love stamps shared above have an image area that measures 1.05 x 0.77" (26.67 x 19.558mm), and the overall individual stamp size is 1.19 x 0.91" (30.226 x 23.114mm).

At minimum focus distance, expect soft image quality in the periphery at the widest apertures. By f/11, corner image quality improves substantially, though rather strong lateral CA remains.

Need a shorter minimum focus distance and higher magnification? Mount an extension tube behind this lens to significantly decrease and increase those respective numbers. Extension tubes are hollow lens barrels that shift a lens farther from the camera, allowing shorter focusing distances at the expense of long-distance focusing. Electronic connections in extension tubes permit the lens and camera to communicate and otherwise function normally. As of review time, Canon and Sony do not publish extension tube specs or manufacture these items in compatible mounts, but third-party extension tubes are available.

This lens is not compatible with extenders/teleconverters.

Sigma 30mm F1.4 DC DN Contemporary Lens Front View on Camera

Build Quality & Features

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The Sigma 30mm F1.4 DC DN Contemporary Lens has an aesthetically pleasing design that maintains tight tolerances and has a quality finish. The gently tapering design leads to the only moving feature, the long, straight, and comfortable-to-use focus ring.

Sigma 30mm F1.4 DC DN Contemporary Lens Product Images

MFD |    w/ Hood:  MFD |    Rotated   Compare »

The Sigma 30mm F1.4 DC DN Contemporary Lens features a TSC (Thermally Stable Composite) exterior. "TSC is a state-of-the-art polycarbonate that is designed to be both lightweight and extremely durable, and its chemical makeup means it doesn’t shrink or expand with changing temperatures. This material is so high-quality that we’re also incorporating it into our Art and Sports lenses to provide lightness and thermal consistency." [Sigma]

180° of the barrel's mount area features molded-in ribs that facilitate grip for mounting and dismounting the lens.

This lens has no buttons or switches. As hinted earlier, I miss the AF/MF button the most. Positive is that the lack of switches means increased reliability and decreased opportunity for dirt and moisture penetration.

Sigma 30mm F1.4 DC DN Contemporary Lens Mount

"Sigma Contemporary lenses feature a mount gasket that protects against dust and moisture, but for affordability purposes, the balance of the lens is not sealed. Sigma claims that "The vast majority of contaminants work their way into lenses through the rear mount, so as long as they aren’t abused, these lenses will provide many years of trouble-free use, even in moderate weather. For regular use in more extreme conditions, Art or Sports lenses are the way to go." [Sigma]

That said, for this Sigma Contemporary lens model, only the Leica L-mount version includes a mount gasket.

This Sigma lens is compatible with advanced mirrorless camera features, including Eye AF, in-camera lens correction (shading, chromatic aberration, distortion), and camera-based lens firmware updates.

Aided by the reduced image circle size required by APS-C imaging sensors, this lens is small and light for its focal length and aperture specifications.

ModelWeight oz(g)Dimensions w/o Hood "(mm)FilterYear 
Canon EF-M 28mm f/3.5 Macro IS STM Lens4.6(130)2.4 x 1.8(60.9 x 45.5)432016
Canon EF-M 32mm f/1.4 STM Lens8.3(235)2.4 x 2.2(60.9 x 56.5)432018
Sigma 16mm F1.4 DC DN Contemporary Lens14.3(405)2.8 x 3.6(72.2 x 92.3)672021
Sigma 30mm F1.4 DC DN Contemporary Lens9.4(265)2.6 x 2.9(64.8 x 73.3)522016
Sigma 56mm F1.4 DC DN Contemporary Lens9.9(280)2.6 x 2.3(66.5 x 59.5)552018
Sigma 18-50mm F2.8 DC DN Contemporary Lens10.2(290)2.5 x 2.9(64.5 x 74.5)552017

For many more comparisons, review the complete Sigma 30mm F1.4 DC DN Contemporary Lens Specifications using the site's lens specifications tool.

Here is a visual comparison of the small Sigma DC DN lenses being simultaneously evaluated:

Sigma 56mm F1.4 DC DN Contemporary Lens Compared to Similar Lenses

Positioned above from left to right are the following lenses:

Sigma 16mm F1.4 DC DN Contemporary Lens
Sigma 30mm F1.4 DC DN Contemporary Lens
Sigma 56mm F1.4 DC DN Contemporary Lens
Sigma 18-50mm F2.8 DC DN Contemporary Lens

The same lenses are shown below with their hoods in place.

Sigma 30mm F1.4 DC DN Contemporary Lens Compared to Similar Lenses with Hoods

Use the site's product image comparison tool to visually compare the Sigma 30mm F1.4 DC DN Contemporary Lens to other lenses.

This small lens features also-small 52mm filter threads. While 52mm enjoys only limited popularity as a filter size, 52mm filters are relatively inexpensive.

Sigma 30mm F1.4 DC DN Contemporary Lens Angle View with Hood

Sigma includes hoods with their lenses, and the LH586-01 Lens Hood ships with the 30mm F1.4 DC DN Contemporary Lens. The LH586-01 offers optimal protection to the front lens element, including protection from dust, water, fingers, limbs, etc., and from flare-inducing bright light.

The hood's interior is mold-ribbed for reduced internal reflections, and the LH586-01's semi-rigid plastic build absorbs some impact, adding a layer of physical protection to the camera and lens. The round-shaped hood enables the lens to stand on its hood (conditions permitting). The rear portion of the hood is rubberized to, along with the mold-ribbed ring, facilitate installation and removal.

Sigma 30mm F1.4 DC DN Contemporary Lens Cap

No lens case is included in the box, but finding a case for a common lens form factor is not challenging. Consider a Lowepro Lens Case or Think Tank Photo Lens Case Duo for a quality, affordable single-lens storage, transport, and carry solution.

Sigma 30mm F1.4 DC DN Contemporary Lens Side View with Hood

Price, Value, Compatibility

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Sigma's game is high quality for a reasonable price. In this case, the price is low. Most of Sigma's lenses are considered a good value, and this lens is especially that.

The "DC" in the name indicates that this lens provides an image circle wide enough to cover (only) an APS-C imaging sensor, and the "DN" indicates that this lens was designed for short flange mirrorless cameras. The Sigma 30mm F1.4 DC DN Contemporary Lens is available in Canon EF-M, Sony E, Nikon Z, Leica L, Fujifilm X, and Micro Four Thirds mounts.

"Sigma lenses are born of well-thought-out design concepts, exceptional Japanese craftsmanship and manufacturing, and advanced lens performance testing and evaluation. To this end, Sigma has developed its own A1 proprietary MTF (modulation transfer function) measuring system using 46-megapixel Foveon direct image sensors. Even the most elusive high-frequency details are within the scope of Sigma's quality control inspections. Every Global Vision lens is A1 tested, analyzed and approved before leaving the factory ensuring maximum performance out of the box." [Sigma]

In regards to the Sony E-mount version of this lens, Sigma develops, manufactures, and sells lenses based on the specifications of E-mount, disclosed by Sony Corporation under license agreement. Sigma provides a 1-year limited warranty, and Sigma USA provides a limited 3-year warranty extension.

The reviewed Sigma 30mm F1.4 DC DN Contemporary Lens was online-retail sourced.

Sigma 30mm F1.4 DC DN Contemporary Lens Top View with Hood


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The Sigma 30mm F1.4 DC DN Contemporary Lens, Sigma 16mm F1.4 DC DN Contemporary Lens, and Sigma 56mm F1.4 DC DN Contemporary Lens form what Sigma refers to as "The F1.4 Mirrorless Trio". The three lenses are complements, share many similarities, and their reviews are completing in parallel.

The compact, lightweight Sigma 30mm F1.4 DC DN Contemporary Lens is a affordable choice for general-purpose use, with the wide f/1.4 aperture increasing this lens's versatility.

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Sigma 30mm F1.4 DC DN Contemporary Lens
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