I know it depends on which lens your using but I wanted to get an idea of what aperture you guys use in your studios to get the sharpest images? The reason I ask is because I find that f-8 or somewhere in that area gives me the sharpest images on all of my lenses but another photographer told me that once he gets better strobes he could produce better images because he would be able to use f-22. In my experiences Ive found that image quality drops off after say f-15 or so. Can anyone tell me if I'm missing something and why you would want to use such a small aperture?? Also when you doing glamour or head shots in front of a paper background wouldn't you want everything sharp? I mean why would you want a shallow or deep DOF in front of paper? A few questions I know but thanks in advance!!