A file with the CR2 file extension is a Canon Raw Version 2 image file created by a Canon digital camera. They are based on the TIFF file specification, so they're usually high quality, uncompressed, and large. http://www.reo14.moe.go.th/phpBB3/viewtopic.php?t=2648940 http://www.reo14.moe.go.th/phpBB3/viewtopic.php?t=1868768 http://www.reo14.moe.go.th/phpBB3/viewtopic.php?t=3255147 http://www.reo14.moe.go.th/phpBB3/viewtopic.php?t=3257327 The 3D modeling program called Poser uses CR2 files, too. However, instead of storing photos, the Poser CR2 files are character rigging files used to hold information about human details like joints and bones, and where and how much they bend. How to Open a CR2 File Images in this format can be opened with free programs like IrfanView and UFRaw. Some versions of Windows will let you view CR2 files without additional apps (for example, in a folder view) but only if the Microsoft Camera Codec Pack or Canon RAW Codec Software is installed. Although c...