The Rokinon 35mm F/1.4 AS UMC A spherical Wide Angle lens is an optically sophisticated lens designed for full-frame cameras. It can also be used on APS-C and Four Thirds cameras. The lens is beautifully constructed with two lenses made of quality glass with a high refraction factor. Weight and dimensions can therefore be as minimal as possible. The lens is also constructed with one a spherical lens that prevents horizontal chromatic aberration. Rokinon has also added a focusing scale to this new lens, which will help the user focus more accurately. With its high quality, dense, anti-reflexive layers, this new Rokinon lens produces stunningly high contrasts and perfectly reflects natural colors. Images come out crystal clear and sharp.