Shooting in RAW format means that the raw image data is captured and no in-camera processing is performed allowing you to have total control over settings such as exposure and color temperature that are usually handled in-camera as you are shooting. Instead you are able to make adjustments when you open the image in your camera (or editing) software. It is nice to use when exposure and color temp is questionable in a given situation. It is used at the expense of memory and speed. RAW images are much larger than standard (jpeg) format so it takes more room on your memory card and takes longer to save.
I use RAW if I feel I am going to want to adjust and experiment heavily with an image. Mostly I shoot high quality jpegs. Camera manufacturers recommend you use their software when opening and adjusting a RAW image as the processing is often proprietary and varies from camera to camera. Adobe Photoshop CS will handle RAW images though and I actually use it as well as the Nikon software that came with my camera.
If, when and how do you use RAW?
