Like other lens makers, Nikon has its own technical jargon for the features and specifications of its lenses. The first bit of Nikon lens jargon is the name – Nikon brands its lenses ‘Nikkor’’ – though some reviewers and retailers us the name ‘Nikon’ instead, just to be clear about who makes them. Nikon camera […]
PF (Phase Fresnel)
PF, or 'phase fresnel' lenses are used by Nikon in some of its more advanced telephoto lenses. They use carefully cut concentric ridges to refract and bend the light equally for all the different color wavelengths. Nikon PF lenses are smaller and lighter than regular telephotos of the same focal length.