paul, nice run through of photography, but if you are useing a camera where you have control of the aperture and shutter speed, larger apertures such as 2.8, 4, 5.6 around that area will give a sharper image, but more focusing is required, the depth of field is reduced, but as paul said there is a relation between aperture, focal length of the lens, film speed, focus and shutterspeed. also with the larger apertures you can get a faster shutter speed, making it easier to hold the camera still for the appropriate exposure time. i have so much more to say, and i'm sure paul did too. maybe there should be a photography thread somewhere in here.
~adam