On (23 Jan 95) Manuel Coats wrote to Tim Irvin...
 MC> Is there some kind of trick to lowering the light level get the
 MC> proper depth of field, yet retain a sharp bright picture? I have
 MC> messed bothwit the Iris and shutter speed and am JUST not getting
 MC> anywhere near the results I want. I have to work within the
 MC> confines of a room about 15'X15' and can't be 100 feet from the
 MC> talent so that I can zoom in to get that special depth of field
 MC> look. 
The shutter speed doesn't affect the depth of field.
When the iris is closed (higher f/number), you'll have more depth of
field.  You'll also need more light, OR a slower shutter speed, since
the smaller iris hole doesn't let as much light reach the camera.
Any book about photography would provide several examples and a more
detailed explanation.  Look in the library for a how-to book on 35mm
and portrait photography.  The same lighting principles apply to
video.  American Cinematographer magazine is also a great resource,
even if you aren't able to follow all the details it shows you how
professional movie-makers approach their work.
... I cna ytpe 300 wrods pre mniuet!!!
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