The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 20mm F2.8 and the Sony 16mm F2.8 Fisheye for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sony 16mm F2.8 Fisheye is the longer of the two lenses at 67mm. The Sony E 20mm F2.8 with a length of 20mm, is 47mm shorter. Besides being longer, the Sony 16mm F2.8 Fisheye also has a larger diameter of 75mm compared to the Sony E 20mm F2.8's 63mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sony E 20mm F2.8 weighs 69g, which means it is 331g (82%) lighter than the Sony 16mm F2.8 Fisheye which has a weight of 400g.
Lens Mounts
The Sony E 20mm F2.8 has the Sony E lens mount whereas the Sony 16mm F2.8 Fisheye has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Focal Range
Sony E 20mm F2.8 is a prime lens with fixed focal lenght of 20mm which has an effective (full-frame 35mm equivalent) focal range of
30mm when used on a APS-C / DX format camera.
On the other hand, the 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 a 35mm (FF) equivalent of 24mm.
