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AlanC

UK
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"RE: Jpeg, raw, etc"

AlanC Basic Member
Fri 17-May-02 06:36 PM

It's down to the quality of the final image and the size of the files.

The JPEG mode offers three different levels of compression: Basic, Normal and Fine which reduce the data to approximately 1/16, 1/8 and 1/4 of its original size. The more the image is compressed, the worse the quality gets.

Next you get the TIFF modes: YCrCb uses a colour difference format which is somewhat smaller than RGB but looses some information from the image.

Finally you have RAW (or NEF) mode where the data from the CCD is dumped directly to the memory card to be processed on your computer. This gives you the greatest possible quality since you're working with 12-bit data: the other modes are 8-bit.

File sizes are a different matter: the three JPEG modes produce the smallest files, RAW mode is in the middle and the TIFF modes take the most space.

In practice you're likely to want to use JPEG Fine if you want 'finished' images from the camera or RAW for maximum quality.

Alan.

A general, generic topic Jpeg, raw, etc [View all] , JTI , Fri 17-May-02 03:33 PM
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