The 90mm f/2.8 SLIIs Apo-Skopar from Voigtlander is a manual focus medium telephoto lens with a Nikon AIS F-mount and is optimized for full-frame image sensors. The newly designed optical system uses Abnormal Partial Dispersion glass for five out of seven elements in seven groups to make images rich, three dimensional in character, and extremely sharp. It has an apochromatic design that makes axial chromatic aberration as close to zero as possible. The manual focus lens is designed for use with SLR-type digital and film cameras and has a precision helicoid for smooth precise focusing action. The shortest shooting distance is 3', making it well suited to portraiture.