Description Released in 2007, Canon's SD series is also known as the Digital Elph line. Canon Digital IXUS 850 IS is the replacement to the SD700 IS. The main differences between the two include a jump up to 8.3 megapixels (from 6.2 megapixels) and the new Digic III image processor.
Technical Details 8.0-megapixel CCD
4x Optical Image Stabilized zoom for steady, long zoom shooting
High-resolution 2.5-inch PureColor LCD with scratch-resistant, anti-reflection coating
Sensitivity range to ISO 1600 for sharper photos in low light
Print/Share Button for easy direct printing and downloading
more information on Canon Digital IXUS 850 IS
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Canon Inc. is a Japanese company. It's products include not only Cameras but also photocopiers and computer printers. Founded in 1933 as Precision Optical Instruments Laboratory (in Japanese) the company was renamed Canon in 1935 (a year after releasing it's first camera).
Canon's Raw format is CRW. More information on Canon can be found on the Canon Website and Wikipedia