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High ISO noise and detail

As we'd expect, in order to see the true potential of the 5D Mark III's 22MP sensor it is necessary to shoot in Raw mode and spend a little time adjusting noise reduction and sharpening sliders. That said, we're disappointed by how aggressively the 5D III seems to reduce noise at high ISO sensitivities and along with it, detail.

Smoother JPEGs are more 'print friendly' (assuming you're not making massive prints) and typically look better when displayed at low magnifications on screen, but we suspect that a lot of photographers woud prefer a touch more detail, even at the expense of a little more visible luminance noise. On this page we're showing you several images, shot in both JPEG and RAW mode towards the upper end of the 5D Mark III's ISO sensitivity scale. The aim here is to give you some idea of how the camera performs at default settings, as well as the potential of the files for further adjustment in Raw processing software. We've also included a quick comparison with the previous-generation 5D Mark II and the Nikon D800.

ISO 8000

The sample image below was taken in low light at ISO 8000 and the Standard noise reduction setting. The image is very clean but some of the fine detail in the fur has been lost. We converted the raw file in ACR 6.7 and applied some custom noise reduction (luminance 0, chroma 23, chroma detail 18) which results in a grainier but more detailed image. Some of the individual hairs in the fur are now visible but chroma noise is still very well controlled. On the downside there is more visible luminance 'grain' in the image but this gives the image a more 'film-like' appearance than the smoothed out look of aggressive noise reduction.

ACR 6.7 - Luminance NR 0 / Chroma 23 JPEG - ISO 8000 / NR Standard
100% crop 100% crop

ISO 12800

Again, as you can see from these comparisons, the 5D Mark III's default noise reduction masks quite a lot of fine detail at ISO 12,800, which becomes very obvious when the JPEG is viewed alongside a processed Raw file. We haven't done any in-depth processing here - what you're looking at is just a 'straight' conversion at default settings in Adobe Camera Raw.

ACR 6.7 - Luminance NR 0 / Chroma 23 JPEG - ISO 25600 / NR Standard
100% crop 100% crop

High ISO noise reduction

Here you can see the effect of adjusting the 5D Mark III's high ISO noise reduction settings. As we've mentioned in the noise section of this review, at default settings at higher ISO sensitivities the 5D Mark III's application of noise reduction is a little heavy-handed, resulting in comparatively clean output but a loss of fine low-contrast detail. It is interesting to note how close 'Standard' noise reduction is to 'high' here, and while you can get more detail by dialling down noise reduction to 'low' or 'off' we'd always opt for shooting raw and carefully adjusting noise reduction post-capture if fine detail is critical.

ISO 25,600

The scene below was shot at ISO 25,600, under low-intensity tungsten light. We shot four exposures with noise reduction set to off, low, standard and high, and added a processed Raw file for comparison.
JPEG Noise Reduction 'Off' (100% Crop)
JPEG Noise Reduction 'Low' (100% Crop)
JPEG Noise Reduction 'Standard' (100% Crop)
JPEG Noise Reduction 'High' (100% Crop)
Raw file processed 'to taste' in Adobe Camera Raw 6.7 (100% Crop)

Compared to the EOS 5D Mark II and Nikon D800

We thought it would be interesting to see how the Canon EOS 5D Mark III compares to its predecessor, the 5D Mark II, and to its arguably closest rival, the Nikon D800 in low light and at high sensitivities. You can compare the cameras at their respective native resolution in our comparison tool but for the purpose of this test we have downsampled the Nikon D800 image to the size of the EOS 5D Mark III file. As the EOS 5D Mark II's file size is almost identical to the Mark III we did not modify its size. We processed raw files from each camera with ACR's sharpening and noise reduction set to '0'. The 36MP Nikon D800 image was then downsampled to match the 22MP resolution of the 5D Mark III. Identical amounts of low-radius sharpening were applied to all images in Photoshop.

The scene below was shot at ISO 6400 under low color-temperature (approx. 2600K) artificial light, designed to be representative of typical indoor lighting. This accentuates the appearance of noise due to the low level of blue light in the spectrum of the light source. This means that to achieve accurate white balance the blue channel has to be amplified strongly, and the green channel to a lesser extent - thereby increasing the visible noise.

Canon EOS 5D Mark III
ISO 6400 ACR 6.7 Raw
Canon EOS 5D Mark II
ISO 6400 ACR 6.7 Raw
Nikon D800
ISO 6400 ACR 6.7 Raw

When comparing the EOS 5D Mark III to its predecessor it becomes clear that the new model has improved in terms of noise performance, with lower levels of both the grain and the color blotches of chroma noise. This is particularly visible in the shadow areas of the image. The downsampled D800 image however compares favorably to the 5D Mark III. The Nikon applies a slightly more contrasty tone curve to its image and while noise levels in brighter image areas are comparable to the Canon the Nikon is cleaner in the shadows. That said, overall the difference isn't great and, considering the high sensitivity, both cameras, 5D Mark III and D800, are doing a very good job.

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Total comments: 20


I am new to the Canon brand and was considering a 5D3 or a 7D2. I need a camera that captures images and short video clips of very fast sports at close and far ranges. So for me, speed, image quality, and movie quality are the most important.

Edit: I should add that the sports are indoor but very fast, and I usually cannot use flash, so I have to work with what's available.

If there is another camera that you recommend beyond these two, please let me know. I have only used a Nikon D4S in the past which did well but I can no longer use that. Thanks in advance and sorry if this is a low-level question.

Comment edited 7 minutes after posting

First test ever here the 5d mark iii filming in 4k Magic lantern also unlock Raw

Pascal Parvex

It is not filming in 4K, it is still 1080p. It was just uprezzed (DNG files).


your right


I am owner of 5d mark III.
I ll totally disagre about noise free image of mark III.
Camera make iso free, but with jpg image, where is use in camera noise filter.
I can do it in photoshop with any camera.
More important, and no one talk about that, raw image on 1600!! iso have noise, 3200 and more, have lot of noise.
And second thing, image on higher noise are not sharp!


Which lenses you use?

1 upvote
Abel Sy

Hello, I've just bought a 5D3 W/ 24 - 105MM lens, upon playing w/ it, looking for the command for multiple shots, the auto focus was affected and not wokring anymore. I don't know and can not make it back to original setting. Is somebody there know and tell me what to do? please help.
P.S. I tried the lens to put in another camera and it works, and attached another lens to 5d3, but didn't work as well. so I confirmed that the problem is the setting w/in the body.


A minor nitpick: Canon's first 35mm autofocus SLR was not the EOS 650 but the T80.


Hello i just need a professional the Canon 5D Mark III suitable for broadcast?

1 upvote
Pascal Parvex

No one has answered, so here is an non-professional opinion: Should be. Since the Mark II, the 5D series has gotten some heavy use in broadcasting.


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.


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?


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 hope it helps!!

Comment edited 3 minutes after posting

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

Cyrus the Great

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

'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.


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

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.


The Nikon 85 1.2 and 200 1.8 is better than the Canon ones... oh wait, no, it was the 8-15 f4. ;)


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

Total comments: 20