The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 85mm F2.8 SAM and the Rokinon 85mm F1.4 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Rokinon 85mm F1.4 is the longer of the two lenses at 75mm. The Sony 85mm F2.8 SAM with a length of 52mm is 23mm shorter. Besides being longer, the Rokinon 85mm F1.4 also has a larger diameter of 78mm compared to Sony 85mm F2.8 SAM's 70mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sony 85mm F2.8 SAM weighs 175g, which means it is 364g (67%) lighter than the Rokinon 85mm F1.4 which has a weight of 539g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Sony Alpha Mount for size comparison purposes.
Telephoto Prime Lenses in Sony Alpha Mount for Size Comparison
Both Sony 85mm F2.8 SAM and Rokinon 85mm F1.4 has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Rokinon 85mm F1.4 is also available in Canon EF , Four Thirds, Pentax KAF, Samsung NX and Nikon F (FX) mounts.