RAW File thumbs can only be displayed by a program that can read the file such as Rewshooter, capture one or PS etc. (as far as I know) PS file browser can display them, it it supports them 20D is canon CRW2 (I think) PS CS supports them with web update, dont know about earlier versions. Jim might know. You should have two files per shot, 1 is the RAW shot and will have the extension .CRW and the other is a Meta file that store the shooting data and will have the extension .THM 16 bit as Twopynts described. Limited functionality in image editing ICC as Twopynts described is the colour profile i.e. Adobe 1998 RGB, sRGB colour space etc, this is used for colour management in some programs and for printing the colours correctly (if printer and monitor are colour calibrated and matched (DHolman and Michelle are the best people to ask that I know of) probably plenty others can explain it too. Jim will likely know. How I save my RAW (not saying this is the best way) Copy to Hard drive into a relevant named folder, I usually name the folder by location, subject or model name. i.e. yvonne_may_2005 In that folder I make 2 sub folders yvonne_may_2005_tiff (here I store 16 bit tiff or PSD) yvonne_may_2005_jpg (here I store 8bit Jpeg) Any possibly inside the jpg folder yvonne_may_2005_small (web size images as required) Finally I back up the folder onto CDs and or DVD and archive them. Also if you are shooting/converting into Adobe 1998 RGB you need to convert these to sRGB for web use, because web browsers and most monitors cant display the Adobe 1998 RGB colour space and therefore colours look washed out.

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