The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 16mm F2.8 Fisheye and the Rokinon 14mm f2.8 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 14mm f2.8 is the longer of the two lenses at 96mm. The Sony 16mm F2.8 Fisheye with a length of 67mm is 29mm shorter. Besides being longer, the Rokinon 14mm f2.8 also has a larger diameter of 87mm compared to Sony 16mm F2.8 Fisheye's 75mm 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 16mm F2.8 Fisheye weighs 400g, which means it is 152g (27%) lighter than the Rokinon 14mm f2.8 which has a weight of 552g.
Both Sony 16mm F2.8 Fisheye and Rokinon 14mm f2.8 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 14mm f2.8 is also available in Canon EF , Nikon F (FX), Four Thirds, Pentax KAF and Samsung NX mounts.
Sony 16mm F2.8 Fisheye is a prime lens with fixed focal lenght of 16mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 24mm.
Rokinon 14mm f2.8 is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 21mm.