Hi there i have recently bought a Nikon D90 with the kit lens. I am relatively new to digitial slr cameras as i mainly use a medium format Rolleicord. the problem im am having is that when i manually focus on a distant detailed object at the widest angle setting it appears in the viewfinder to be in perfect focus, but when i view the photo back on the computer its slighty out of focus. Is there anyway i can ensure total focus when using manual focus on distant objects. im not used to veiwing through a small viewfinder.