The Zeiss Milvus 135mm f/2 is a manual focus, telephoto prime with full frame coverage for Nikon F mount DSLR cameras. It offers an advanced optical design that virtually eliminates color fringing and other aberrations while providing greater image clarity and color accuracy. The Distagon-type design ensures maximum quality and sharpness, especially when using a very wide aperture on a high-megapixel camera. manual focusing is benefited by engraved focusing and depth of field scales, along with an IR position dot for those using modified cameras. There are hard stops at both infinity and minimum focusing positions and weather sealing allows you to shoot in almost all conditions. This lens is ideal for wildlife, product photography, and portraits as well as for shooting video thanks to a de-clickable aperture ring.