Nikon D300 User Manual page 84

The JPEG Compression Menu
The [JPEG compression] item in the shooting menu offers the
following options for JPEG images:
Option
Size priority
O
(default)
d
P Optimal quality
The NEF (RAW) Recording Menu: Type
The [NEF (RAW) recording] > [Type] item in the shooting menu
offers the following compression options for NEF (RAW) images:
Option
Lossless
N
compressed
(default)
O Compressed
Uncompressed NEF images are not compressed.
58
Images are compressed to produce relatively
uniform file size. Quality varies with scene
recorded.
Optimal image quality. File size varies with
scene recorded.
NEF images are compressed using a reversible
algorithm, reducing file size by about 20–40%
with no effect on image quality.
NEF images are compressed using a non-
reversible algorithm, reducing file size by about
40–55% with almost no effect on image quality.
Description
Description