EOS FD-NEX,EOS EF-NEX,AF-NEX , CY-NEX , N(G)-NEX , LeciaR-NEX , PK-NEX , MD-NEX , M42-NEX...
The optical element of adapter reduces focal length of camera lens by 0.72x magnification, close to near 1:1
magnification in APS-C sensor, e.g. 35mm x 1.5 x 0.72 = 37.8mm.
．Increase maximum aperture by 1 stop
．Makes lens 0.72x wider
．Electronic integration of aperture diaphragm, controlled by or from the camera body
．Powered by camera body.
．No external power source required