I took a few shot in RAW but I can't open them in GIMP.

I think the newer versions of GIMP will read Sony ARW files.

"The way to solve this is to figure out the correct exposure and set the camera manually. You can do this by experimenting with the empty setup. "
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>>You mean changing the aperture and shutter speed ? Or playing with the white balance ?
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>>Cause I think the white balance, is adjusted for the 18% gray (for human caucasian color), is it possible that's why I see grey instead of white ? or it's not related ?

The white balance won't make whites gray. Having the wrong white balance will make whites yellow, or red, or blue, etc. If your whites are gray, they are underexposed.


"Shoot the pictures in RAW and then adjust the exposure in the GIMP to get the background to become unobtrusive. "
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>>How do you exactly adjust the exposure that way ?

I don't use the GIMP very often since I have Photoshop elements. There is certainly a "levels" or exposure adjustment somewhere in there. You would just increase or decrease the exposure to get the background where you want it.
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Chris Harrison
San Antonio, Texas

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