The Sony Lens GM 35/1.4 is the G-master version of the Zeiss 35/1.4 that we have had in stock for some time. Like the Zeiss optic, the GM version has an "de-clickable" aperture, which is ideal for film applications. In addition, the GM 35/1.4 has a focus button that can be assigned to stored focus points. The lens cannot be used with teleconverters. The 11 aperture blades create a beautiful bokeh and can be stopped down from f1.4 to f/16.