The samyang 85mm f14 as if umc is a bright prime lens that has been designed to work with both full frame and aps c cameras the optical construction comprises 9 elements in 7 optical groups including one aspherical lens just like all the other samyang lenses this product is also made of the anti reflective umc coatings to improve the contrast quality and faithfully reproduce all the colours the 8 blade aperture brings extremely smooth background blur on the photography