…join me in the search for the simplicity found on the other side of complexity!
There is an inverse relationship between depth of field (DOF) and f-stop. As you reduce your lens’ f-stop, going from f/2.8 down to f/16, f/22 (and even f/32 and f/45 on some lenses), your DOF increases. When shooting a macro photo this increased DOF is very tempting. It is easy to crank the aperture down as small as you can if you are using strobes, or if the subject is motionless and allows long exposure times with a tripod.
Then why not do it!? After all, you’ll have a better image because more if it will be in focus, right? Well, yes, you’ll have more DOF, but. . . you won’t necessarily get a better photo. The smallest apertures on a lens rob you of that razor sharp edge detail that helps create a really stunning macro photograph. This sharpness is technically known as “acutance”.
Asparagus with Snap!
Why does the sharpness decrease with smaller f-stops? (more…)
