How many Directors, do you think,
actually learn about different lenses and
the effect on an image when you play
around with the iris or aperture control,
or the difference that a filter can make?
All of them, if they're any good. You don't
have be a technical expert, but you need
to know enough to help you achieve your
vision for your movie. You have to have
some idea what you want to see on
screen.
When your just beginning, its always a
good idea to learn about the
'Classical
Hollywood Narrative', (developed in the
1920's and still used today) which sets
out the rules for film construction that
governs the
standard shot sizes and
sequencing i.e Long shot, medium
shots, close-ups, to camera movements
(Pans, tilts, tracking shots etc) and the
rules related to movement.
When your creating an atmosphere, it's
essential to know how to use light, and in
particular basic lighting set ups such as
'3 Point Lighting'.