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Old 23rd of October 2008 (Thu)   #1
StephenJames
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Default High ISO and Banding on 50D

Can someone tell me what is with banding at high ISOs... I have the 50D and first thing i did with it was to take it out for a test at Hi1 and Hi2 and i got horizontal bands all through the image... I don't mind noise.. in fact i love grain in my black and white images, but this banding makes these ISO levels useless... what gives?
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Old 23rd of October 2008 (Thu)   #2
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Default Re: High ISO and Banding on 50D

You might want to post some examples.
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Old 23rd of October 2008 (Thu)   #3
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Default Re: High ISO and Banding on 50D

@ which speeds too. I've seen images posted that didn't show banding.
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Old 23rd of October 2008 (Thu)   #4
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Default Re: High ISO and Banding on 50D

In jpeg or raw?
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Old 23rd of October 2008 (Thu)   #5
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Default Re: High ISO and Banding on 50D

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@ which speeds too. I've seen images posted that didn't show banding.
Didn't they say Hi1 and Hi2? That's 6400 and 12800 I believe.
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Old 23rd of October 2008 (Thu)   #6
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Default Re: High ISO and Banding on 50D

yes both 6400 and 12800... Both RAW and JPEG... I'll post some examples when I get home
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Old 23rd of October 2008 (Thu)   #7
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Default Re: High ISO and Banding on 50D

How 'bout at 1600 and 3200?
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Old 23rd of October 2008 (Thu)   #8
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Default Re: High ISO and Banding on 50D

and to boot, I can see the horizontal lines right on the LCD screen of the camera, so I don't think it has anything to do with post processing in ACR as I've seen posted somewhere else on these forums... its simply awful.
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Old 23rd of October 2008 (Thu)   #9
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Default Re: High ISO and Banding on 50D

1600 is great... 3200 is not so bad... but anything higher shows banding in the shadow areas... i have firmware 1.02 by the way.
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Old 24th of October 2008 (Fri)   #10
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Default Re: High ISO and Banding on 50D

it's just the typical Canon high-ISO banding that I've observed in my 20D and 30D... anything above ISO 1600 you'll see those lines. So looks like Canon STILL hasn't fixed that yet...

ah well.

Does your 5D do that? Just curious.
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Old 24th of October 2008 (Fri)   #11
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Default Re: High ISO and Banding on 50D

I remember reading somewhere on here that auto lighting optimizer being turned on when your using high ISO can cause alot of banding.
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Old 24th of October 2008 (Fri)   #12
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Default Re: High ISO and Banding on 50D

Quote:
Originally Posted by Bonjour43ma View Post
it's just the typical Canon high-ISO banding that I've observed in my 20D and 30D... anything above ISO 1600 you'll see those lines. So looks like Canon STILL hasn't fixed that yet...

ah well.

Does your 5D do that? Just curious.
did you leave the 40d out on purpose?
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Old 24th of October 2008 (Fri)   #13
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Default Re: High ISO and Banding on 50D

I noticed with my 50D that the banding is much worse when in the same room using those new compact flourescent light bulbs. I suspect the higher gain amps in the camera are somewhat sensitive to emitted RF energy. I've not tried any high ISO yet out in the country away from interference to confirm this theory. But, the fact that it varies depending on what room I'm shooting inside my house makes me think there is some validity to this. No, I don't have samples, deleted them all after playing around. However, the in camera JPEGs come out pretty good even at high ISO.
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Old 24th of October 2008 (Fri)   #14
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Default Re: High ISO and Banding on 50D

I've noticed weird colors when shooting under fluorescent lights. Try shooting at 60 shutter speed.
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Old 24th of October 2008 (Fri)   #15
StephenJames
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Default Re: High ISO and Banding on 50D

Here are two images... the first is the a reduced image of the 15mp file.. showing the banding.. Iso 12,800 shutter 1/160th and f/7.1



and a 100% crop



I've also just noticed all these little white specs in the 100% crop... that concerns me a bit.. its like they are missing bits of the photo... pure white... not too happy about this...
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Last edited by StephenJames : 24th of October 2008 (Fri) at 11:49.
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