Hey peeps. I love to manual focus with my lovely full frame penta-prisim viewfinder but something has me thinking my eyes may not be as perfect as they once were. I was taking pics of a crayon the other day and i was thinking my lens was soft or the DOF was too shallow, but after reading some posts i considered maybe its my eye sight and my diapoter isnt properly adjusted. Is there anyway to make shure it is? LIke a test or something i can do?