CR2 file

File extension	.cr2
Category	Image File
Description	The Canon RAW version 2 (cr2) format is a RAW format created by Canon for storing digital images. This does not contain a ready to view picture like a JPG or PNG file, it is used to store information directly coming from the sensor. You can choose to store your pictures in RAW format which gives you the benefit of being able to do a lot of post processing on the file, if you tried to do this with JPEG, this would be difficult and would likely result in a quality loss.
Actions	CR2 Converter View other image file formats
Technical Details	RAW files are the best quality to size ratio that a photograph can be stored in, primarily because each colour is recorded in either 12 or 14 bits and a lossless compression is used. The CR2 takes over from Canon's previous format - CRW and is used by the Canon 350D, 1D, G9 and 20D models.
Associated programs	Adobe Photoshop Adobe Photoshop Lightroom Paint Shop Pro Picasa digiKam
Developed by	Canon Inc.
MIME type	image/cr2
Useful links	Inside the Canon RAW Image format Canon EOS Rebel T3 Series: Choosing the RAW File Type CR2 Converter

Using Zamzar it is possible to convert CR2 files to a variety of other formats

This page contains information on the CR2 file extension (Canon RAW version 2), a popular image file format