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In-camera Lens Corrections

The Canon EOS 5D Mark III comes with optional in-camera optical corrections which Canon calls 'Lens aberration correction' in the menu. Peripheral Illumination Correction and Chromatic Aberration Correction are available in the Shooting menu. If these features are enabled the camera will attempt to reduce the respective effects based on Canon's profiles of current lenses. Even though lens compensation will be applied to the JPEG file when shooting in raw+JPEG, the raw file will remain uncompensated.

Peripheral illumination (vignetting) and Chromatic aberration correction can be enabled in the camera's shooting menu.

Distortion correction, on the other hand, can only be applied during in-camera Raw conversion after shooting. This is a step forward from the 5D Mark II where distortion correction could only be applied in Canon's DPP software, but ideally you'd have the option to enable distortion correction for JPEG images.

Distortion correction

As you can see in the images below, distortion correction does a very good job of keeping the image from showing the barrel distortion caused by the lens. This shot was taken with the EF 24-105mm F4 L lens at its widest focal length. The sample was shot as Raw+JPEG, and we then converted the Raw file in-camera to apply distortion correction.

When examining the corrected images there is a touch of corner softness which is almost certainly a consequence of the correction process, but overall the distortion correction is doing an excellent job, eliminating a large portion of distortion with only a minimal loss of quality at the edge of the frame.

Distortion Correction On
Distortion Correction Off

CA compensation

When activated in the menu CA correction does a good job of removing fringing as you can see in the the sample crop below. This image was taken with the EF 24-105mm F4 L lens but each lens will have its own particular CA characteristics. Therefore results will vary with the lens you use.

CA Correct On
CA Correct Off

The rollover above shows a 100% crop. The click-through links to the full image. This feature is enabled by default and we imagine most people will leave it enabled, as there is really no noticeable detriment to overall image quality or continuous shooting speed.

Peripheral illumination correction

The following vignetting (peripheral illumination) correction analysis was shot using the EF 24-105mm F4 L lens, at the widest focal length and F4. As you can see in the samples below the correction function is quite effective at reducing vignetting.

Vignetting Correction On
Vignetting Correction Off

With the feature enabled the far corners of the frame retain 55% of the center brightness. When shading compensation is off the brightness drops to 22% of center brightness. Although the compensation does not remove all of the vignetting caused by the lens, it will make a noticeable difference, especially in images with large areas of continuous tone, as you might find in bright skies. And even though peripheral illumination correction works by essentially increasing the brightness in the corners of the image, we don't see a significant increase in visible noise in the compensated areas.

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Comments

Total comments: 9
Vmo9
By Vmo9 (4 months ago)

I have used the 5D Mark III for over a year and have just finished selling my Nikon gear (sad day after being a Nikon enthusiast for 30 plus years). From auto-focus to camera build to overall quality, this camera can do it all! Even with the slow burst rate, it works well for sports and nature shooting! I can't recommend this camera enough. I have found the auto-focus system to be quick enough for Equestrian events with long lenses, such as Canons 400mm f2.8 or new 200-560mm.

2 upvotes
Rob728
By Rob728 (5 months ago)

I have just bought a 5d mkii, and when doing a comparison test (nothing scientific) against my 50d I find that the 5d3 seems to under expose by upto 1stop, is this normal?

0 upvotes
schutzaphoto
By schutzaphoto (6 months ago)

I work in Nyc as a fashion photographer and I have to say the the 5d series are the most used cameras out side of medium format cameras .Ive been shooting with the mark 3 for over a year after shooting with the mark 2 for 2 years great both great cameras. You can see the shots I've taken with it on my website www.brianschutzaphotography.com hope it helps!!

Comment edited 3 minutes after posting
1 upvote
VABMAN
By VABMAN (3 months ago)

Nice shots,...I've always dreamed to be a fashion photographer.

0 upvotes
Cyrus the Great
By Cyrus the Great (7 months ago)

Nikon D800 is clear winer over 5D iii in every things. Nikon has much sharper lens.
don't know why some people buy Canon???!!!!!

1 upvote
R D Carver
By R D Carver (7 months ago)

'Some people' buy Canon because they earn their living using a camera. Oh man, you should see those forests of white and red-ringed lenses in the pro pit at every major sporting, media and news event! 'Some people' are winning the major competitions, filling the fashion and nature magazines and filming box office busting movies with Canon. "Nikon has much sharper lens" Which lens exactly? Give a photographer a Canon 5D MKIII and an EF 70-200mm F/2.8 L IS II USM Lens and he can take on the world. Nikon is good, Canon is good why get tribal? it is so petty and amateur. At work I can pick up a Nikon/Sony D800 body or a Cannon 5D MKIII. I prefer the Cannon because I don't like the white balance on the Nikon. Others are happy to use the Nikon, but the die hard Nikon enthusiasts are disappointed that Sony make the sensors for Nikon. In comes Sony in comes the green tinged white balance.

5 upvotes
WillieG
By WillieG (6 months ago)

No cameras white balance is perfectly neutral. That's why we have the ability to manually change it on the camera and even fine tune on some of the higher end models. Nikon cameras do run slightly toward the cool side, but they can always be fine-tuned to be neutral in-camera. Canon cameras have always leaned towards the orange color tint. Luckily for Canon the end result is a slightly warmer image that many photographers like the looks of. Few pros would buy a camera that couldn't be made to produce true colors. And that forest of white lenses has been thinning out quite a bit since the advent of the Nikon D3. I'm one die-hard Nikon enthusiast who's ecstatic with Sony sensors. No other brand can even match their dynamic range.

Comment edited 6 minutes after posting
1 upvote
solomonshv
By solomonshv (2 months ago)

why is the D800 is the clear winner? because of a few test charts? which camera do you own? the 5DM3 or the D800? i switched from nikon to canon because i liked canon's lenses better.

ever been to a major sporting event or a press conference? if you did you'd notice an abundance of off-white telephoto lenses with red rings on them. saying that "some people buy Canon" is misleading because pretty much everyone who makes a living off their camera gear uses Canon. and believe me, there are very good reasons for that. if you don't know what they are then it will be a waste of time trying to explain them to you. you still wont get it because you are too busy looking at test charts.

0 upvotes
mufflon
By mufflon (8 months ago)

thx for putting the Shadow noise test in your review. it was time to show that quite big difference.

0 upvotes
Total comments: 9