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DPChallenge Forums >> Hardware and Software >> Canon 40D posterization?
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Showing posts 26 - 43 of 43, (reverse)
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 11/20/2007 01:03:12 AM · #26
Shannon, I think this is just God screwing with you because your participation in that other thread. :P
 11/24/2007 12:53:56 AM · #27
I had the same thing happen to me suddenly one day. Every time I went to save an edited file I kept getting similar results. Somehow the settings for JPeg quality had gone to high compression. Took me forever to figure out what was going on. Using different camera and software but imagine could be similar prob.
 11/24/2007 01:13:27 AM · #28
Instead of us trying to figure it out for you remotely by guessing, with no access to your gear, here's what I suggest...if you really want to eliminate the camera as being the culprit, take it over to Canon and have them "tune-up" the AF and everything else.

I'm in southern California where there is the west coast Canon service center about 15 minutes from me and many folks know have walked in and had them service their cameras. (yes, we're spoiled) It takes anywhere from a couple of hours to a few days, depending on the work done. If you need to ship it to your nearest center, you may be without it for about a week to 10 days (or more). There is the east coast service center in NJ.

Finally, if you don't want to part with your camera for that long, try the free "Focus Test Chart" procedure first. Keep in mind that this won't decisively determine if your problem is caused by the camera or the lens, but it may give you some insight. :-(

11/24/2007 08:39:47 AM · #29
it looks like your 20D is just a better camera all around. Are you feeling the same way?
 11/24/2007 09:13:01 AM · #30
I think this posterization is result of heavy noise reduction, which is noticed in many of the new cameras. For me, because of this one thing I decided not to buy canon SLR which I was contemplating(but others cam also have it , it seems).
 11/25/2007 01:53:44 PM · #31
sensor cleaner is stuck on?

just popped into my head.


11/25/2007 10:50:32 PM · #32
How about the Digic III's "Face Detection" AF routine? Is it even part of the EOS options as it is on the Canon P&S lineup?
 11/25/2007 11:49:59 PM · #33
go to dpreview and search posterization you will get lots of thread discussion this one thing.
It was a problem with sony-h9 and this topic was discussed to death.
 11/26/2007 01:21:42 AM · #34
I'd say that it definitely warrants a trip to the service center.

I upgraded from the 30D a while back, and every frame has been far superior in image quality.

Did you monkey around with some custom picture style settings (or something along those lines)?

Have you tried the reset to factory defaults yet?
11/30/2007 10:20:13 PM · #35
So...what's up with the posterization issue on the 40D? Anyone know?

Is this an isolated incident, or is this being seen on lots of 40Ds?

I am thinking of selling one of our 30D's to move up to the 40D, but this thread kind of stopped me in my tracks. Now I'm wondering if I should go 40D or not.

What seems to be the overall opinion of all of you 40D owners?
 12/05/2007 09:26:22 PM · #36
Shannon, did you ever figure this out? I'm debating on a 40D, but this report kinda makes me nervous.
 12/05/2007 09:55:19 PM · #37
Leroy,

Please take into consideration that there are probably 10's of thousands of 40D out in the field and when one person reports that they are having issues with theirs doesn't mean that this is a trend. Even on other sites, those that complain about issues with their 40D's are a fraction of percentage of total 40D owners. We're talking 0.000001%, maybe?

Keep in mind that 1) no product is flawless, and 2) those owners with 40D issues are going to be vocal about it. 3) The vast majority of photographers that are very happy with their 40Ds never say a word--they don't have to. :-)


12/05/2007 10:27:10 PM · #38
Originally posted by fotomann_forever:
Shannon, did you ever figure this out? I'm debating on a 40D, but this report kinda makes me nervous.


I've done more comparison shots with the 20D (and 5D) with inconclusive results, so I didn't want to post further until I was sure of something. Some shots were coming out perfectly clean, while others had "muddy" details at settings I would expect to be clean. I may have found the cause literally last night, and I think it IS Photoshop. When I got the 40D, neither PS nor Apple's software supported the new RAW files, and I didn't want to install DPP, so I basically started using the 40D and CS3 simultaneously. What I didn't realize (because I never really bothered with that tab) is that the RAW sharpening defaults are apparently different in CS3. Playing around with that adjustment appears to make a substantial difference, and I believe that's where the detail is getting lost. I should learn more as I work with it over the next couple of days.

Message edited by author 2007-12-05 22:28:43.
 12/05/2007 11:29:34 PM · #39
Originally posted by scalvert:
What I didn't realize (because I never really bothered with that tab) is that the RAW sharpening defaults are apparently different in CS3.

Shannon, in both versions, they are preset to 25.

However, the new "Noise Reduction" has 25 for the color-based noise, whereas this didn't exist in CS2. Maybe the noise reduction is softening the image a bit?

Finally, check the color space setting in Adobe Camera RAW. In CS3, there is what looks to be a hyperlink at the bottom center of the application. I think, by default, it is set to some 8-bit color space, at some low ppi. I changed mine to "Adobe RGB (1998); 16 bit; 3888 by 2592 (10.1MP); 300 ppi"


12/05/2007 11:32:24 PM · #40
Originally posted by AperturePriority:

Keep in mind that 1) no product is flawless, and 2) those owners with 40D issues are going to be vocal about it. 3) The vast majority of photographers that are very happy with their 40Ds never say a word--they don't have to. :-)


I dunno... I think I'm trying to talk myself into a 5D :-D
 12/05/2007 11:35:55 PM · #41
Originally posted by AperturePriority:
However, the new "Noise Reduction" has 25 for the color-based noise, whereas this didn't exist in CS2. Maybe the noise reduction is softening the image a bit?


That's exactly where I think the problem is occurring. I had both apps set to 16-bit Adobe RGB.
 12/05/2007 11:47:41 PM · #42
Originally posted by fotomann_forever:
I dunno... I think I'm trying to talk myself into a 5D :-D


Adorama has the 5D plus a free Canon Pixma Pro 9000 Photo Inkjet Color Printer for $2099.

I bought the 5D body for $3000 with a $300 rebate and thought it was a steal. Now that it's just over $2000, it's a heckuva bargain.

12/05/2007 11:51:25 PM · #43
Originally posted by scalvert:
Originally posted by AperturePriority:
However, the new "Noise Reduction" has 25 for the color-based noise, whereas this didn't exist in CS2. Maybe the noise reduction is softening the image a bit?


That's exactly where I think the problem is occurring. I had both apps set to 16-bit Adobe RGB.


Now you are exactly correct. Smearing is mostly related to noise reduction.
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