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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 01 Dec 2009 (Tuesday) 14:05
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7D IQ/High ISO test

 
tharmsen
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Dec 01, 2009 14:05 |  #1

I recently got to shoot with my buddy's 7D. So I put it through its paces.

First, here are some sample images for you to chew on from the test setup. The camera was mounted to a tripod and fired with a remote release. The images were shot in RAW and exported through DPP with default settings to JPG. No editing was done except where noted (cropping or sharpening).

ISO 100:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 800:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 1600:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 3200:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 6400:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!



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tharmsen
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Dec 01, 2009 14:05 |  #2

Here are some high ISO pixel peeping crops from the 7D.

ISO 100 for a baseline:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 800:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 1600:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 3200:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


ISO 6400:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


...and for grins ISO 12800:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!



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tharmsen
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Dec 01, 2009 14:13 |  #3

Here's a shot of the can so you can see the text. This first crop has no sharpening applied. I should also mention the lens used on the 7D was a 17-55 f/2.8 IS.

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


This shot has 80% unsharp mask applied in CS3 (1.0 radius / 0 threshold):
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


For comparison I shot the same test scene with my 5D Mark II. Here's a crop from the 5D2 of the same can. This is out of camera and not sharpened:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


The same image sharpened with the same settings as above for the 7D:
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


The 5D2 images are noticeably sharper than the 7D images. The lens used on the 5D2 was a 24-70 f/2.8L.



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AllenF
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Dec 01, 2009 14:39 |  #4

There is a added dose of softness to the 7D over the 5D for sure. I think the 7D will need more work in PP to get it closer. The 7D also lacks in the overall contrast too. Again more work in PP will yield better final results.

Owning the 50D now and looking at 7D IQ comparisons with a little PP the 50D is very close so I see no need to move to the 7D on IQ alone. Feature set? Now that is a whole other can of worms :).

I think I will wait for the 3D or 5DmkIII with the AF of the 7d in FF. I just hope it will not cost near the 1DmkIV. I also hope Canon does not muck it up with a gazillion pixels and there goes the IQ that makes the 5DmkII such a special body. Time will tell.

Noticed that the lenses were different. I would say try the L lens on both. This may be one reason the 5DmkII looks sharper and more 3D than the 7D. Try to keep everything the same except the body. L glass comes at a cost for a reason. ;)


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tharmsen
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Dec 01, 2009 15:02 |  #5

The 17-55 f/2.8 is an extremely popular lens for 1.6 bodies and is by most peoples accounts L quality, but Canon won't put the L moniker on an EF-S lens.

As a side note, the 24-70 f/2.8L isn't exactly known for its extreme sharpness. The 24-105 f/4 is sharper and has fewer reported problems. If anything, the 17-55 f/2.8 is every bit as sharp as a good copy of the 24-70.

:D




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Dec 01, 2009 15:54 |  #6

seems like some of the images are slightely differently exposed... did you put your lens on MF?
anyways, good to see some usable 3200s except that... DR is slacking.


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Panopeeper
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Dec 01, 2009 16:45 |  #7

Replaces wrote in post #9116380 (external link)
anyways, good to see some usable 3200s except that... DR is slacking.

Do you mind to explain what that means?


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braidkid
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Dec 01, 2009 17:08 as a reply to  @ Panopeeper's post |  #8

Good test Tharmsen.

I did similar tests with the 7D and 40D with the same lens and found there was negligible difference between the two at 3200 ISO. That doesn't seem to be the same experience for a lot of folks here but it's what I saw. Seems to me the ISO noise may appear less due to smaller pixels but it's still just as prevalent at the pixel level. I can try and post the files here later...


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Jethro790
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Dec 01, 2009 17:14 |  #9

tharmsen wrote in post #9115555 (external link)
The 5D2 images are noticeably sharper than the 7D images.

Congratulations! You came to the correct verdict! But I could have told you that without all the cropping of teddy bears and tin cans.:p


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Jethro790
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Dec 01, 2009 17:16 as a reply to  @ Jethro790's post |  #10

Ooops, I mean monkeys!


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Dec 01, 2009 17:26 |  #11

Why not just use the 24-70 on both bodies, if you had both bodies and lenses available? Micro adjust that lens for both bodies then run the test, it would remove one factor. Just curious more than anything.

btw, now I am hungry for ravioli, not the Chef Boyardee kind but the real stuff!


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tharmsen
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Dec 01, 2009 17:41 |  #12

I had about 30 minutes to conduct my tests, so I didn't have the luxury of time. I would have also liked to have shot the same scene using JPEG with various levels of NR applied in body. Perhaps I'll get that opportunity at some point.

This isn't a test of the lens as much as it's a test of the ISO capabilities of the 7D. The 17-55 is a exceptionally sharp lens so I doubt using the 24-70 on it would have changed the outcome of the sharpness test images. The 5D2 images are for reference. There have been a number of blog posts going back and forth about the image sharpness of the 7D and one specifically mentioned the 5D2. So I figured since I owned one, I would toss in the pics for good measure.

I should also note that another poster on another forum gave me some sharpening tips.

Here's the monkey's head sharpened using CS3 and unsharp mask. This time I sharpened the image 500% with a radius of .3 and a threshold of .0. Check this out.

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!


That's pretty darn sharp compared to the unsharpened version:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!



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Dec 01, 2009 17:46 |  #13

Yes the 7D requires a bit more than the 40D/50D, the same was true when the 40D was released over the 30D. I wish Canon would leave the AA filter alone, but maybe due to the increased resolution, they had to mess with it again.


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nicksan
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Dec 01, 2009 17:47 |  #14

tharmsen wrote in post #9115487 (external link)
The images were shot in RAW and exported through DPP with default settings to JPG. No editing was done except where noted (cropping or sharpening).

In other words, there was NR applied to these images correct?
Just want that cleared up since I am not seeing any color noise in any of the images. I do see the "blotches" that's typical of high ISO images.




  
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kevindar
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Dec 01, 2009 17:50 |  #15

I have my 7D arriving. we will see how it stacks up against my 5D2. Interesting.


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7D IQ/High ISO test
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