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 Samyang 16mm f2.0 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Samyang 16mm f2.0 is the longer of the two lenses at 89mm. The Sony 16mm F2.8 Fisheye with a length of 67mm, is 22mm shorter. Besides being longer, the Samyang 16mm f2.0 also has a larger diameter of 83mm compared to the Sony 16mm F2.8 Fisheye's 75mm diameter.
The 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 183g (31%) lighter than the Samyang 16mm f2.0 which has a weight of 583g.
Lens Mounts
Both the Sony 16mm F2.8 Fisheye and the Samyang 16mm f2.0 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.
Samyang 16mm f2.0 is also available in Canon EF , Canon EF-M, Fujifilm X, Nikon F (DX), Four Thirds, Micro Four Thirds, Pentax KAF, Sony E and Samsung NX mounts.
Focal Range
Both lenses have the same focal range of 16mm but while Sony 16mm F2.8 Fisheye has the fastest aperture of F2.8, the Samyang 16mm f2.0's widest aperture value is F2.0.