I just looked at a pair that Ritz Camera is hawking. It's a 4.0 aperture with a fixed lens and small at that. Resolution is 2 mega pixles which isn't bad for a point and shoot, but don't expect to print over 4x6 with it.
It must be shutter speed goverened since the apature is fixed and that would really be limited in what it's capable of. For example, I normally shoot critters at somewhere between an aperture of 2.8 to 9 depending on the light. The goal is to shoot it fast to keep the critter from moving, but at the same time allow for better depth of focus. Ideally, 9 would yeild a better picture if you could keep the shutter open long enough without movement. I try to shoot at a speed of 60 or faster if possible and really like it over 100. For a shot of a still object like a barn, I'll go up to an aperture of 25 with as slow of a shutter as it takes. That way you get maximum depth of focus.
Skipper
