Vivitar 7 Elements 2X Tele Converter for Sony

The Vivitar Macro Focusing Teleconverter is a precision optical component designed to expand your photographic capabilities in two ways: As a premium quality 2X teleconverter, it effectively doubles the focal length of the lens it's used with and maintains the resolution and contrast of any fine optic at a higher level than most standard teleconverters. In addition, the Vivitar Macro Focusing Teleconverter's unique focusing mechanism enables you to do macro work without modifying or adding other equipment to your lens/teleconverter combination. With the Macro Focusing Teleconverter your standard 50mm lens becomes a 100mm macro lens with a reproduction ratio of upto 1:1 (lite sìze image of your subject on the film piane).