Canon PowerShot S20 3.2MP Digital Camera w/ 2x Optical Zoom Smallest 3-megapixel zoom camera available 3.3 megapixel sensor captures enough detail for photo-quality prints at 8 x 10 and beyond 2x optical plus 4x digital Canon autofocus zoom lens Uses Type I or II CF cards, including Microdrive; Included 16 MB card holds 31 images at default resolution Connects with Macs and PCs via USB port; uses 2CR5 disposable lithium battery (included) or optional rechargeable battery kit