The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE PZ 16-35mm F4 and the Rokinon 8mm 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 FE PZ 16-35mm F4 is the longer of the two lenses at 88mm. The Rokinon 8mm f2.8 Fisheye with a length of 77mm, is 11mm shorter. Besides being longer, the Sony FE PZ 16-35mm F4 also has a larger diameter of 81mm compared to the Rokinon 8mm f2.8 Fisheye's 75mm 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 FE PZ 16-35mm F4 weighs 353g, which means it is 90g (20%) lighter than the Rokinon 8mm f2.8 Fisheye which has a weight of 443g.
Lens Mounts
The Sony FE PZ 16-35mm F4 has the Sony E lens mount whereas the Rokinon 8mm f2.8 Fisheye has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Focal Range
Sony FE PZ 16-35mm F4 has a focal range of 16-35mm and
2.2X zoom ratio .
On the other hand, the Rokinon 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.