The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 16-35mm F2.8 GM II and the Samyang 8mm F2.8 Fisheye 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, 51% (282g) lighter than the Sony FE 16-35mm F2.8 GM II's weight of 547g.
Lens Mounts
Both the Sony FE 16-35mm F2.8 GM II and the Samyang 8mm F2.8 Fisheye has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Samyang 8mm F2.8 Fisheye is also available in Samsung NX mount.
Focal Range
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.
On the other hand, the 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.
