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5d mark II strange black dots?

Ivan Gundulić , Dec 01, 2008; 07:42 a.m.

I have seen few of high ISO night shots with new 5D mark II from various sources and it seams to me that there some very strange picture quality issues. On night cityscape shots strange black dots appear around light sources. That thing would not bother me if the problem is specific for high ISO values but you can see those black dots even at 100 ISO. Can anyone confirm that issue. I think no matter what camera settings are, those kind of things should not happen. I have provided link bellow where you can see http://glubsch.wordpress.com/ (scroll down on night city shots)

Responses


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Ronald Moravec , Dec 01, 2008; 09:03 a.m.

Maybe my eyes are failing, but I checked 100 & 1600 and do not see black dots. I do hope the fog had rolled in before you took those.

Ken Schwarz , Dec 01, 2008; 09:28 a.m.

I see what you're talking about: the black dots to the right of the lights running up and down the buildings. Wow. Much more noticeable in the higher ISO shots. This doesn't look like a user error to me. Did you shoot JPEG or RAW? If RAW, which RAW converter did you use?

Ken Schwarz , Dec 01, 2008; 10:37 a.m.

I can see in your blog that you used ACR 5.2 with PS-CS4. Did you also shoot JPEG? If so, do they have the same problem? Does conversion with the Canon raw converter utility show the same issue?

David Long , Dec 01, 2008; 10:54 a.m.

Seems very obvious to me, totally bizarre, and totally unacceptable. I wouldn't expect that it would show up so much more prominently at higher ISOs if it was a RAW converter issue, but I guess it's possible. If the same thing showed up in camera JPEGs, I'd say it's got to be a hardware problem.

Ken Schwarz , Dec 01, 2008; 11:07 a.m.

If it's in the camera, hopefully it's a firmware problem, not a hardware problem... Since the black dots appear right after the bright areas I would guess that there is a bug in some compression/decompression code somewhere. Did you have highlight recovery turned on? It's conceivable that there is an interaction.

Ivan Gundulić , Dec 01, 2008; 11:18 a.m.

"Ronald Moravec Maybe my eyes are failing, but I checked 100 & 1600 and do not see black dots. I do hope the fog had rolled in before you took those."

Scroll down and look at night city shots.

Blog is not mine I stumbled on it. I just noticed that error and have same informations as you guys.Thing is that I have seen few other shoots from other people (some of them on dpreview but I can't find them now) in similar shot conditions and they all show that kind of errors.

I think it's some kind of in camera processing glitch but I'm not sure. Since I'm planing to by 5d mark II myself I was wandering has anyone else encountered same problems and maybe somebody knows why is that happening?

Tim Bowles , Dec 01, 2008; 12:14 p.m.

You can see them in the bridge shots as well. Disappointing.

Scott Ferris , Dec 01, 2008; 12:29 p.m.

At the risk of telling the Emperor he has no clothes on but where I come from they are called windows.......

Now we all knew this stupidity would start but listen guys, you are pixel peeping other peoples stuff at web resolutions, for goodness sake at least talk about your own pictures and any issues you might have with them.

This is just crazy. Take care, Scott.

Keith Reeder , Dec 01, 2008; 01:58 p.m.

Scott...

Normally I find that your opinions tend to gel with mine, but I'm afraid I disagree with you here.

The small images on that page link to full sized versions - here, for instance - and the black dots along the edges of the buildings are clearly unacceptable...


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