My camera is a Nikon D200 which has an APS sized sensor in it. Now the APS sensor being slightly smaller than 35mm requires correction for the scaling of comon lenses. When I put my old 50mm Prime Nikkor AI lens on it is definitely not 50mm through the viewfinder. So the confusion starts. The AF-S DX G type lense I have here is 18-70mm. Now when I look through the viewfinder and zoom, the point where what I see in the view finder being the same size as what I see in my other eye is ABOVE 50mm. Now I can't figure out exactly what that means. How do I go about correcting the Nikkor G lenses for APS sensors if I even need to at all?