I have a Nikon D50 and apparently these new cameras/lenses can focus beyond infinity. With my old film SLR, I used to be able to take perfect pictures of star trails by focusing on infinity. Now if I try to do that, they just turn out blurry. Even after a lot of trial and error, I still couldn't get them in perfect focus. Anyone know why lenses are built like this now, and more importantly, does anyone know any tricks for focusing on stuff like this better? I also had the same problem when trying to photograph the moon. Thanks!