Dear Nikon owers, I have a problem with my N90s and AF20mm/F2.8D. The prints have no problem with for subject(s) in 3-4 ft away. Pictures all turn-out crisp sharp in that distance. However, when shooting on group photo from 10-20 feet away or beyond, I can't find the focus from the print at all. Each photo I shoot I made sure the cicular focus light is on before taking the picture. What is the problem? The focusihng is set for automatic, spot, and single. Thanks for your advice.