A full frame super wide angle lens designed for compatibility with the sony a7 series camera body and multi media work the optical system adopts aspherical lens elements in the best positions to reduce aberration to a minimum with 3 lenses molded from super low dispersion glass that specifically reduces lateral chromatic aberrations the frin lens transmits aperture distance and optical information to the sony a7 series cameras mf assist function its in camera 5 axis image stabilizations