The Voigtlander 28mm f/2.8 Color Skopar SL-II is a wide angle pancake lens in Nikon F-mount and is compatible with both Nikon full-frame FX and crop-frame DX sensor cameras. Despite its small size and light weight (0.4lbs!), the Voigt 28mm does have an all-metal lens construction. Its 6 group / 7 element optical formula includes one double-sided aspherical element, helping to minimize optical aberrations. Its close focus distance of 8.66" lets you get in close to your subject for great exaggerated perspective shots. If you need a compact wide angle that offers full-frame coverage, the Voigt 28mm is good lens to consider.