Highly recommended for those wanting to capture crystal clear images hybrid aspherical lensesh asp extra low dispersioned ultra multi coatingumc floating type design glass aspherical lensesas circular aperture with 8 blades new samyang 16mm f20 ed as umc cs is a ultra wide angle manual focus lens designed for cs cropped sensors aps c cameras the samyang 16mm is a rectilinear lens offering superb image quality and low distortion it is perfectly s