Something wrong with my 1D?

[Kristian]

I've had some issues with my EOS 1D. If the pictures get just a little contrasty, they tend to show a lot of.....hmmm.......colour noise??

Some examples:

http://i8.photobucket.com/albums/a4/kris2823/web.jpg

100% crop:

http://i8.photobucket.com/albums/a4/kris2823/crop.jpg

Another 100% crop in B&W:

http://i8.photobucket.com/albums/a4/kris2823/crop2.jpg

What could be the problem?

[ofdphoto]

What ISO? And were you shooting RAW?

At first glance it looks like JPEG compositing, but I might be wrong.

[Kristian]

Oh, forgot to mention.....
Shot in RAW at ISO 200. Converted to 8bit JPEG in Bibble Lite.

[ofdphoto]

Did you get the same effect in the original RAW file? I'm suspecting it's a problem with the JPEG conversion ...

[Kristian]

No, actually it looks much better if I take a 100% crop of the RAW-file in Bibble Lite.
But how can I avoid this JPEG-issue?

[ofdphoto]

Not sure ... I use PhotoShop CS2 ... maybe check out the post-processing forum for alternative RAW processing software?

[liquidstone]

Looks like what I get in OOF areas when I convert to 8-bit TIFF or jpeg (worse in jpeg) and do aggressive levels adjustment. Try converting to 16-bit TIFF, process, then save in 8-bit TIFF or jpeg after all adjustments are done.

Romy

[Kristian]

But can I just save the TIFF-file as a JPEG, in PS? (I use an older version. v5.5)

[Doom1701e]

What I do is covert RAW to TIFF in the Canon DPP, open the TIFF in CS2 (if you only have PS 5.5 you might want to look into the newest Photoshop Elements which I think is less that $100 in the US, dont know about Denmark), do the editing in PS and save for web as a high quality JPEG. That should give you better results. From the samples you have provided and the fact the images look better in RAW I am pretty certain the distortion you are seeing is from JPEG compression. Good luck! :)

[Permagrin]

I am pretty certain the distortion you are seeing is from JPEG compression. Good luck! :)

I am too...good advice Doom.
(and Kristian, isn't it great that it's just a computer program and not your wonderful camera :) )

edit: you could always do a test...do some shots in jpeg w/o the conversion and see what you think. The quality won't be as good as raw but you'd get an idea of whether or not it's straight out of the camera that way...but I'm really sure it's just the conversion.

[Kristian]

Thanks very much for your help here, guys!

And yes, I am glad there's nothing wrong with my camera!

[RgB]

Looks like what I get in OOF areas when I convert to 8-bit TIFF or jpeg (worse in jpeg) and do aggressive levels adjustment. Try converting to 16-bit TIFF, process, then save in 8-bit TIFF or jpeg after all adjustments are done.

Romy

I also do all my editing in 16-bit adjustment layers. He is correct about the levels that's why it is so important to choose the right metering to get the right exposure. The less exposure, level adjustments are made the less noise artefact you will get.