Originally Posted by Fast Glass
Actually, RAW speeds it up. RAW is uneditedraw data from the sensor, shooting in Jpegmeans the camera has to convert it. Which slows it down. But you can keep shooting longer in burst because the file size is smaller. RAW is not like TIFF, which is a higherquality formatbut data thathas to be converted or just transfered to your card.
RAW or JPEG shouldn't influence potential frame rate. RAW is not unedited raw data from the sensor, though. For a RAW file, the camera creates a small JPEG to embed inside the RAW file, so you at least have something to preview on the LCD screen. The camera also takes the sensor data and compresses it, in a lossless fashion. (JPEG is a lossy compression algorithm.) It's the lossless compression AND the JPEG preview that causes RAW files to be different sizes shot-to-shot.
TIFF is RGB data completely uncompressed, plus EXIF and other metadata. That's why TIFF files are identical size for the same resolution.
AFAIK, Nikon NEF format is sensor data uncompressed.
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