Is Photoshop also set with Adobe Rgb as color space? I have read that is is convenient to use Prophoto in PS, but what really determines what color space is used is the RAW file or JPEG you are opening. Canon DPP does not support Prophoto as Lightroom or ACR plugin do. Anyone saw any convenience in working with Prophoto intead of Adobe Rgb or is it an urban myth? I mean, the books says Prophoto is the widest color space over adobe or srgb and should be evident when making your own prints in a printer capableof displaying the extended gamut,but if you finally convert to SRGB and JPEG for web or printing at your local store, is all this effort lost?