300D: what's wrong with my RAW shots?

[a_dee]

I was investigating my dead pixel problem and had done the tests with the lens cap and viewfinder cap on and took pictures in JPG mode. The results were normal and got the black screen with a few dead/stuck/hot pixels. I then decided to try in RAW, and this was what I got after reading the file in Elements 3.0. All the shots ISO100, even up to 1/4000s were the same. When I take a "normal" picture in RAW, it seems normal, i.e. there's no obvious noise like the black shots.

http://www.plprohome.com/public/crw_1723.jpg

[bidimagic]

The noise in this picture seems normal to me, as long as with the cap on
the image is obviously strongly underexposed so a big amount of noise is generated.
I don't know why it is not present in jpeg image, maybe because the
in-camera compression could reduce that ?
Or, maybe you see the noise in the raw file because the raw conversion
software (ACR or whatever you use) adds by default a lot of brigthness
causing the noise to be more visible.

[TeeJay]

I would stick this image on ebay, someones bound to bid for it!

[StewartR]

Great piece of modern art. It should be in Critique Corner, not here.

[AdamJL]

Maybe I can be a little more helpful than these kind souls.

Photoshop defaults the exposure settings to very high with RAW pictures.
See this thread: I had the same issue with moon shots I took.
http://photography-on-the.net/forum/showthread.php?t=181952

The answers there should help you.
If your problem is th same, it's easily fixed. Hope that helps :)

[StewartR]

Nice one Adam. That must be the reason. I had no idea whatsoever. But still - it is a great piece of modern art! :-)

[That_Guy]

As bidimagic said. Even without the lense cap underexposing alot will give that result.
photosites don't have time to stabilize and va-la noise.

Try the same thing with about 1 sec or so exposure and see if it doesn't clean up alittle.

[a_dee]

thanks for the help guys! adobe's raw convertor was automatically bumping up the exposure to +4 causing the noise.. after setting it back to 0, it seems normal again.

[AdamJL]

+10 for Adam :D