Nikon D300 User Manual page 205

B
Optional Flash Units
Flash compensation is also available with optional 5B-800, 5B-600, 5B-400,
and 5B-R200 flash units.
B
See Also
For information on choosing the size of the increments available when
setting flash compensation, see Custom 5etting b3 ([Exp comp/fine tune],
pg.275).
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