The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 8mm F2.8 Fisheye and the Sony FE 16-35mm F2.8 GM II for their suitability to various photography scenarios:
Size and Weight Comparison
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. Samyang 8mm F2.8 Fisheye weighs 265g, which means it is 282g (51%) lighter than the Sony FE 16-35mm F2.8 GM II which has a weight of 547g.
Lens Mounts
Both the Samyang 8mm F2.8 Fisheye and the Sony FE 16-35mm F2.8 GM II has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Samyang 8mm F2.8 Fisheye is also available in the Samsung NX mount.
Focal Range
Samyang 8mm F2.8 Fisheye is a prime lens with fixed focal lenght of 8mm which has an effective (full-frame 35mm equivalent) focal range of
12mm when used on a APS-C / DX format camera.
On the other hand, the Sony FE 16-35mm F2.8 GM II has a focal range of 16-35mm and 2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 24 - 52.5mm.