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Canon 7D Noise and Banding

Attention!

This topic is locked.

Reason : locked as requested by OP - question answered


chinny 10 492 United Kingdom
23 Dec 2009 5:55AM
Hi Peeps

Just purchased the 7D on the whole I am VERY pleased with it but on some images are very noisy even at iso200 but this image I noticed a few banding lines across the image? its shot at 200 iso and lifted in lightroom by 1 stop.

Do you think I am pixel picking or is this the norm with a 19mp 1.6 sensor?

link to image

Off to the fens now so wont be able to reply until tonight.

P

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GlennH 10 1.9k 1 France
23 Dec 2009 7:25AM
No camera produces noise-free images when you view at 100%, apart from at base ISO settings perhaps. That said, I wouldn't expect much noticeable noise at 200 ISO (on a 5D anyway), but pushing the exposure by one stop might alter that a little - particularly with shadow noise.

With the high pixel density of the 7D sensor, I guess there is some price to pay, but I can't see any banding in your ePz image for what it's worth. Maybe my eyes are going! Web pictures are generally too small for such things to be noticeable.

I don't think it's worth sweating it too much over minor flaws at 'actual pixels'. It's not real world, and the only time you really have to play that game is when you''re submitting pictures to other pixel peepers (agencies, for instance).
User_Removed 9 398 6 United Kingdom
23 Dec 2009 9:12AM
Have a look at the other forums on this and exposing to the right ie over expose slightly but still keeping detail in the highlights - underexposing and pushing will produce this on every camera.
timcordell 11 26 United Kingdom
23 Dec 2009 10:04AM
have you done the fireware update, ver 1.1.0
Coleslaw 10 13.4k 28 Wales
23 Dec 2009 10:25AM
Pushing 1 stop is really not going to help.
Have you look at a correctly exposed shot at ISO200?
cambirder 11 7.2k England
23 Dec 2009 11:36AM
If you look at the underside of the hawk, its still under exposed so we are getting on for two stops under exposure for the shadow area which will increase the issue. I don't think there is a particular issue with the camera, just under exposure in a tricky lighting situation.
chinny 10 492 United Kingdom
23 Dec 2009 6:47PM
Thanks for the replies Smile


Quote:Have you done the fireware update, ver 1.1.0

Yep Updated from day1


Quote:Pushing 1 stop is really not going to help.
Have you look at a correctly exposed shot at ISO200?


Yep you can see it Sad

I have now uploaded an image taken today it looks worse on this image ?!"? I think its going back Sad
uploaded image
Coleslaw 10 13.4k 28 Wales
23 Dec 2009 6:56PM
Upload one with correctly exposed then, Paul.
chinny 10 492 United Kingdom
23 Dec 2009 7:05PM

Quote:Upload one with correctly exposed then, Paul.


Tis done, incidentally I just processed the image with Canon DPP and it looks a lot better?? I processed the previous ones with Lightroom 2.5 ? Not even sure if they have this profile installed yet?

P
Coleslaw 10 13.4k 28 Wales
23 Dec 2009 7:21PM

Quote:Tis done

Where?
chinny 10 492 United Kingdom
23 Dec 2009 7:22PM
Coleslaw 10 13.4k 28 Wales
23 Dec 2009 7:26PM
But those were underexposed to start with, weren't they?
chinny 10 492 United Kingdom
23 Dec 2009 7:28PM
Yes thats what I said from the start


Quote:ifted in lightroom by 1 stop.

are you with me Wink or am I not with you ? Smile

P
Coleslaw 10 13.4k 28 Wales
23 Dec 2009 7:31PM
I know!
I said

Quote:Upload one with correctly exposed then, Paul.

I mean those correctly exposed originally, not those corrected in Lightroom or DPP. Just to see if a correctly exposed shot has any noise.
Are you with me now? tut tut tut..... LOL
chinny 10 492 United Kingdom
23 Dec 2009 7:34PM
Still not with you? you mean straight from the camera?