Nikon PK-13 (27.5 mm) Auto Extension Tube AI - Black

The Nikon PK-13 Auto Extension Tube (Black) is designed to provide you with a closer minimum focusing distance, & is useful for macro photography. The extension tube provides 27.5mm of extension, & is compatible with any Nikon SLR lens that is longer than 50mm (or with a reversed 50mm lens, using a reverse adapter). The extension tube allows youtoget closer to your subject, which has a magnifying effect, making your subject appear larger. Extension tubes are useful as a cost efficient solution to allowing any lens to have the effects of a macro lens without purchasing one.