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 Monday, August 3, 2015
3D Isometric MTF Chart
The new MTF Comparison Tool has just received 4 additional chart types. Joining the Average and Variance charts are the 2D Map and 3D Isometric charts in 10 lp/mm and 30 lp/mm formats.
 
Among the additional lenses loaded into the tool are the 24-70mm f/2.8 zooms (Canon, Nikon and Sigma). Remember that CA is generally more prevalent in zoom lenses (especially in the maximum focal length extents) and that CA is a significant factor in corner MTF performance (and is generally an easy-to-correct aberration). If you see chart lines/colors showing decreasing MTF measurements toward the corners (right side or periphery), CA may be at least some of the cause. Reference the Lens Image Quality Tool to see if CA is a significant component of a dropping MTF chart measurement for a specific lens.
 
One of the zoom lens additions is the new Sigma 24-35mm f/2 DG HSM Art Lens. Of note is that, while the tool says "Average" for the chart type, only one copy of this lens was available for MTF testing. The test results will be updated (and the other chart types added) when a larger sample size is available. B&H has the Sigma 24-35mm f/2 DG HSM Art Lens in stock.
 
There are enough results in the MTF tool to entertain for hours. Here is a comparison that I find interesting. While these are not equivalent apertures (one stop apart), B&H has the Zeiss 135mm f/2 Lens in stock with a $300 instant rebate bringing the price down to far less than half that of an Otus.
 
Be sure to share the MTF tool with your friends!
Post Date: 8/3/2015 8:38:13 AM CT   Posted By: Bryan
 Friday, July 31, 2015
Canon EF 600mm f/4L IS II USM Lens
Image quality results from the EOS 5Ds R have been added to the Canon EF 600mm f/4L IS II USM Lens Review.
 
When the distances get long and/or the subjects get small, this is my go-to lens.
 
B&H has the Canon EF 600mm f/4L IS II USM Lens in stock.
Posted to: Canon News
Post Date: 7/31/2015 12:00:00 AM CT   Posted By: Bryan
 Wednesday, July 29, 2015
Canon EF 400mm f/2.8L IS II USM Lens
Image quality results from the EOS 5Ds R have been added to the Canon EF 400mm f/2.8L IS II USM Lens Review.
 
Another fantastic all-around-performing lens.
 
B&H has the Canon EF 400mm f/2.8L IS II USM Lens in stock.
Posted to: Canon News
Post Date: 7/29/2015 9:53:12 AM CT   Posted By: Bryan
 Tuesday, July 28, 2015
Canon EF 300mm f/2.8L IS II USM Lens
Image quality results from the EOS 5Ds R have been added to the Canon EF 300mm f/2.8L IS II USM Lens Review.
 
There is more than one reason why this lens is "Super".
 
B&H has the Canon EF 300mm f/2.8L IS II USM Lens in stock.
Posted to: Canon News
Post Date: 7/28/2015 6:57:57 AM CT   Posted By: Bryan
 Monday, July 27, 2015
 Thursday, July 23, 2015
Canon EF 100-400mm f/4.5-5.6L IS II USM Lens
Image quality results from the EOS 5Ds R have been added to the Canon EF 100-400mm f/4.5-5.6L IS II USM Lens Review.
 
You probably already guessed this, but the 100-400 L II is another of my favorite lenses.
 
B&H has the Canon EF 100-400mm f/4.5-5.6L IS II USM Lens in stock.
Posted to: Canon News
Post Date: 7/23/2015 7:45:49 AM CT   Posted By: Bryan
 Tuesday, July 21, 2015
Lens MTF
It is with great pleasure that I announce the latest addition to the site's tools: Lens MTF Comparison
 
Required Reading: To get the most out of these beautiful charts and to learn about MTF measurements, please take some time to read through the Lens MTF Help page.
 
Many prime lens results are immediately available in the MTF tool and many additions are planned, including zoom lenses. We'll announce the additions as they become available. Aperture tests in addition to wide open are also expected to be included at some point.
 
These MTF charts are made available under agreement with my friend Roger Cicala and his crew at Olaf Optical Testing with support provided by LensRentals.com. Go rent a lens!
Post Date: 7/21/2015 7:29:21 AM CT   Posted By: Bryan
 Monday, July 20, 2015
Canon EF 11-24mm f/4L USM Lens
Image quality results from the EOS 5Ds R have been added to the Canon EF 11-24mm f/4L USM Lens Review.
 
This is another of my favorite lenses. Not ony for the amazingly wide angles it provides, but for the solid image quality at those wide angles.
 
B&H has the Canon EF 11-24mm f/4L USM Lens in stock.
Posted to: Canon News
Post Date: 7/20/2015 7:36:37 AM CT   Posted By: Bryan
 Thursday, July 16, 2015
Canon EF 16-35mm f/4L IS USM Lens
Image quality results from the EOS 5Ds R have been added to the Canon EF 16-35mm f/4L IS USM Lens Review.
 
The 16-35 f/4L IS is one of my favorite lenses and is looking great in front of the 5Ds.
 
B&H has the Canon EF 16-35mm f/4L IS USM Lens in stock with a $100.00 MIR available.
Posted to: Canon News
Post Date: 7/16/2015 7:51:41 AM CT   Posted By: Bryan
 Monday, July 13, 2015
Canon EF 50mm f/1.8 STM Lens
Just posted: Canon EF 50mm f/1.8 STM Lens Review.
 
The 50mm f/1.8 STM is not a perfect lens, but it is nearly Canon's smallest and lightest lens. And that it is Canon' least expensive lens we can all appreciate.
 
B&H has the Canon EF 50mm f/1.8 STM Lens in stock.
Posted to: Canon News
Post Date: 7/13/2015 7:43:55 AM CT   Posted By: Bryan
 Monday, July 6, 2015
Canon EOS 5Ds
Just posted: Canon EOS 5Ds Review.
 
The Canon 5Ds promised to perform amazingly and it has delivered on that promise.
 
B&H has the Canon EOS 5Ds in stock and the 5Ds R available for preorder.
Posted to: Canon News
Post Date: 7/6/2015 8:47:24 AM CT   Posted By: Bryan
 Thursday, July 2, 2015
Canon EF 50mm f/1.8 STM Lens on EOS 5Ds R
Image quality results from the EOS 5Ds R have been added to the Canon EF 50mm f/1.8 STM Lens Review page.
 
While testing Canon's cheapest lens on their highest resolution camera may seem to be a pairing of opposites, there is a point to be made here. The 50 STM is not a great performer at f/1.8, showing a "dreamy" look to be kind. If we review a comparison between the 5Ds R and 1Ds III with the 50 STM at its f/1.8 aperture, we see that the 5Ds R can extract more resolution from even a poor performing lens. Look at the white being more clearly delineated between the black lines in the top crop to most easily see this.
 
Stop down to f/4 and be amazed at how well a $125 lens can perform.
 
B&H has the inexpensive Canon EF 50mm f/1.8 STM Lens in stock.
Posted to: Canon News
Post Date: 7/2/2015 10:19:45 AM CT   Posted By: Bryan
 Wednesday, July 1, 2015
Canon's Ultimate EOS 5Ds and 5Ds R General Purpose Lenses
Finding the ultimate general purpose lens for the new EOS 5Ds R cameras entering my kit was a high priority for me. With image quality results from the EOS 5Ds R now available in the Canon EF 24-105mm f/4L IS USM Lens Review, the three primary Canon lens choices are available for comparison.
 
The Ultimate 5Ds General Purpose Lens Candidates
 
Canon EF 24-70mm f/2.8L II USM Lens
Canon EF 24-70mm f/4L IS USM Lens
Canon EF 24-105mm f/4L IS USM Lens
 
The Comparisons
 
To be honest, I thought the 24-70mm f/2.8L II would be easy to declare the winner and optically, it is the best of this list. However, the two f/4 lenses perform better in front of 50.6 megapixels than I expected.
 
The f/2.8L II is slightly sharper over then entire focal length range at f/2.8 than either of the f/4 lenses are at f/4. At the equal f/4 comparison, the f/2.8L II is noticeably sharper and is still sharper at f/5.6. At f/8, the differences are slight and at f/11, diffraction essentially evens the playing field. Choosing an image sharpness winner between the two f/4 lenses is a challenge, but more noticeable is the 24-105's higher CA and distortion levels.
 
The f/2.8 lens has a 1 stop wider aperture, giving it the ability to stop action in 1/2 as much light as the other two lenses and the ability to create a stronger background blur. The 24-70mm f/4L IS rules the maximum Magnification (MM) spec with a 0.70x rating vs. the competition's 0.23x and 0.21x specs. The two f/4 lenses have image stabilization, allowing them to be used handheld in far lower light levels than the f/2.8 lens (as long as the subject is not in motion). The 24-105 L has the benefit of reaching to 105mm on the long end.
 
The f/2.8L II is slightly larger than the 24-105mm f/4L IS, which is slightly larger than the 24-70mm f/4L IS. The f/2.8L II has a modestly more substantial lead in the weight category, weighing in 5 oz (142g) more than the 24-105mm f/4L and 7 oz (198g) heavier than the 24-70mm f/4L. These lenses are similarly well-built.
 
Small differences between these lenses include the 2012-introduced 24-70mm models having 9 blade apertures vs. the 2005-introduced 24-105mm's 8 and the f/2.8 lens having an 82mm filter thread size (vs. 77mm). A not-so-small difference is the f/2.8L II's price relative to the f/4L IS models.
 
The Conclusions
 
All of these lenses are easily good enough for use in front of a 5Ds. The decision differences for many will come down to price, aperture and overall versatility.
 
If your investment in the 5Ds has left you monetarily strained, a good value may be your highest priority. In that case, the 10 year old 24-105mm f/4L IS, purchased in white box or refurbished condition would be a great choice. Canon omitted the 24-105 L from its EOS 5Ds Lens Recommendations List, but ... I think this model is very worthy of consideration.
 
If you need to stop action in low light or want to create the strongest background blur, you need an f/2.8 aperture and the choice is easy. While the 24-70mm f/2.8L II will impact your wallet the greatest and will leave you without IS, this is the most amazing lens choice optically.
 
For overall versatility, I'll give the nod to the 24-70mm f/4L IS. The smallest and lightest lens of the group, the 24-70mm f/4L IS offers great image quality along with the best-performing image stabilization system and a macro-lens-like close-focusing capability. While more expensive than the white box or refurbished 24-105 f/4L IS, the 24-70 f/4L IS has the same regular price as the 24-105 L and is also a good value.
 
The Ultimate 5Ds General Purpose Lens
 
While it would be easy to justify a decision for any of these three lenses, I'm going to declare the EF 24-70mm f/2.8L II Lens to be the ultimate EOS 5Ds general purpose lens. Canon apparently agrees with this choice as this is the lens shown mounted in the Canon-supplied EOS 5Ds product images. However, I will not be selling my 24-70 f/4L IS lens anytime soon.
 
Learn More about the Lenses
 
Canon EF 24-70mm f/2.8L II USM Lens Review
Canon EF 24-70mm f/4L IS USM Lens Review
Canon EF 24-105mm f/4L IS USM Lens Review
 
In Stock at B&H:
 
Canon EF 24-70mm f/2.8L II USM Lens
Canon EF 24-70mm f/4L IS USM Lens
Canon EF 24-105mm f/4L IS USM Lens
Posted to: Canon News
Post Date: 7/1/2015 9:39:28 AM CT   Posted By: Bryan
 Tuesday, June 30, 2015
Canon EOS 5Ds R
While the Canon EOS 5Ds Review (coming soon) will feature a complete review of the 5Ds cameras (including the R functionally), the Canon EOS 5Ds R Review takes a closer look at the differences between these two cameras.
 
Posting the 5Ds R differences review before the full 5Ds review may seem backwards, but ... we know most of what these cameras are about already. They are based on the 5D Mark III (including the AF system) with a new sensor and some new features. The resolution, noise and sounds are now known and available on the site. With these results all being excellent, for many (including me), the decision remaining to be made was between the 5Ds and the 5Ds R.
 
The 5Ds R review focuses on those differences and especially on moiré and the commonness of its occurance. I'll reveal my personal choice at the end.
 
While B&H has had the Canon EOS 5Ds in stock since the first delivery was received, the Canon EOS 5Ds R preorders have not yet been completely filled. If this is the camera you want, reserve your place in line.
Posted to: Canon News
Post Date: 6/30/2015 9:14:42 AM CT   Posted By: Bryan
 Monday, June 29, 2015
Canon 50mm f/1.8 STM and II Lenses Compared
While the Canon EOS 5Ds review has been my highest priority, the Canon EF 50mm f/1.8 STM Lens review has not been derailed and is also approaching completion.
 
One of the biggest differences between the 50mm f/1.8 II and the 50mm f/1.8 STM lenses, as their names imply, is the AF system implementation and the audibility differences of these systems is especially notable. The 50mm f/1.8 STM's focusing sound is greatly improved/reduced over the 50mm f/1.8 II presence-announcing buzz.
 
While much can be discerned from this post's image (the STM lens AF sound is depicted on the left), the difference that really matters will best be determined by your ears (turn up your speaker volume):
 
Canon 50mm f/1.8 STM Lens AF Sound Compared to f/1.8 II
 
The perfect lens AF sound would of course be a flat line, but ... AF moves parts and moving parts tend to make at least some noise. In this case, the STM is audible and audible enough for on-camera mics to pick up. The sounds in this example are from an identical near full extents change in both directions at full speed. As with some other STM lenses, a slow change in focus distance (such as when recording video) results in a noticeably quieter sound.
 
Much more to come.
 
The EF 50mm f/1.8 STM Lens, Canon's least expensive lens, is in stock at B&H.
Posted to: Canon News
Post Date: 6/29/2015 9:10:33 AM CT   Posted By: Bryan
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