Vivitar 2X Macro Focusing MC Teleconverter, for Nikon AI Mount

The Vivitar Macro Focusing Teleconverter is a precision optical component designed to enlarge your photographic capabilities. The Macro Focusing Teleconverter effectively doubles the focal length of the lens while maintaining the resolution and contrast of any fine optic at a higher level than most standard teleconverters. It's unique focusing mechanism allows you to do macro work without modifying or adding other equipment to your lens/teleconverter combination. This teleconverter is designed to work with an array of high quality lenses and can deliver a reproduction ratio of up to 1:1 (life size image of your subject on the film plane).