The Canon EOS 20D is an 8.2-megapixel semi-professional digital single-lens reflex camera, initially announced on 19 August 2004 at a recommended retail price of US$1,499. It is the successor of the EOS 10D, and was succeeded by the EOS 30D in August 2006. It accepts EF and EF-S lenses and uses an APS-C sized image sensor. Improvements The 20D features a new sensor and a greater megapixel count (8.2 megapixels instead of 6.3) and retains the Canon 1.6x crop factor. The 20D supports USB 2.0. The 20D has a larger buffer and can shoot more frames per second. It also uses the E-TTL II flash metering system and uses the DIGIC II image processor. The EOS 20D (with appropriate firmware updates) can also accept the Canon Wireless File Transmitter WFT-E1/E1A for fast file transfer to a remote file server, either through an ethernet cable or a Wi-Fi network. Resolution The Canon EOS 20D has several resolution settings: Large/Fine (3504 x 2336 JPEG Fine) Large/Normal (3504 x 2336 JPEG Normal) Medium/Fine (2544 x 1696 JPEG Fine) Medium/Normal (2544 x 1696 JPEG Normal) Small/Fine – 1728 x 1152 JPEG Fine Small/Normal (1728 x 1152 JPEG Normal) RAW + Large/Fine (3504 RAW + 3504 JPEG Fine) RAW + Large/Normal (3504 RAW + 3504 JPEG Normal) RAW + Medium/Fine (3504 RAW + 2544 JPEG Fine) RAW + Medium / Normal (3504 RAW + 2544 JPEG Normal) RAW + Small/Fine (3504 RAW + 1152 JPEG Fine) RAW + Small/Normal – (3504 RAW + 1152 JPEG Normal) RAW (3504 x 2336 RAW) Features The 20D is the first Canon prosumer camera to use the EF-S lens mount; the first Canon EOS camera to use the mount was the 300D (the Digital Rebel in North America). Creative Zone A-DEP: The camera automatically selects the aperture and shutter speed to keep most of the image in focus. (Only recommended in high light conditions as the camera tends to choose smaller f/stops) M (Manual): The camera lets you choose manually the aperture and shutter speed. Av (Aperture priority): The camera lets the user choose the aperture (f/) value and then automatically adjusts the shutter speed for correct exposure. Tv (Shutter speed priority): The camera lets the user set the shutter speed and automatically sets the aperture for correct exposure. P (Program AE): The camera automatically chooses an aperture and shutter combination for correct exposure and the user can change