The EOS 20D has been designed to capture images with speeds that had been reserved for professional level cameras. Whether it's the 0.2 second start-up time, the high speed mirror drive, the class-leading 65 msec. shutter release lag time, or the predictive AF focusing at speeds up to 5 frames-per-second, the EOS 20D will amaze and delight photographers who don't want to wait for their camera when they're ready to shoot. The 20D's CMOS Sensor allows 4-channel high-speed data readout, and the DIGIC II Image Processor processes the data quickly, writing files to the CompactFlash card faster, and allowing continuous shooting for up to 23 frames (JPEG Large/Fine) with significant reductions in buffer clearing times.
JPEG or Simultaneous RAW+JPEG Whenever you shoot the EOS 20D, you can choose to have it record RAWs or JPEGs alone, or in RAW plus JPEG formats simultaneously. The JPEG recording format is ideal for purposes such as Internet image transfers that require reduced file sizes. Canon's proprietary RAW (.CR2) format, on the other hand, employs lossless compression to ensure the highest possible image quality, and is recorded at 12-bits per pixel to provide a wider range of tones and superior detail in bright highlights and deep shadows when compared with JPEG files. RAW files must be "processed" before they can be opened in your computer's image-editing software. This conversion process typically takes only a few seconds using the dedicated driver software, which will convert the RAW file into a standard 8-bit per channel JPEG or TIFF file, or for maximum tonal range, a 16-bit TIFF. There are six selectable settings for in-camera JPEG image quality, when CF card space is at a premium.