This new converter is matched for use on the Sonnar T* 140mm f2.8, Sonnar T* 210mm f4 and the new Tele-Apotessar T* 350mm f4. It provides for a 1.4X i

This new converter is matched for use on the Sonnar T* 140mm f2.8, Sonnar T* 210mm f4 and the new Tele-Apotessar T* 350mm f4. It provides for a 1.4X increase in focal length for the installed lens while only one f-stop of light is lost. The Mutar 1.4X is composed of six elements in five groups. It offers a fully automatic diaphragm and the amazing ability to carry Auto-Focus through itself to operate the Carl Zeiss T* lens.