The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7artisans 12mm F2.8 and the Rokinon 7.5mm f3.5 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. 7artisans 12mm F2.8 is the longer of the two lenses at 66mm. The Rokinon 7.5mm f3.5 Fisheye with a length of 48mm, is 18mm shorter. Besides being longer, the 7artisans 12mm F2.8 also has a larger diameter of 63mm compared to the Rokinon 7.5mm f3.5 Fisheye's 60mm 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. Rokinon 7.5mm f3.5 Fisheye weighs 197g, 33% (98g) lighter than the 7artisans 12mm F2.8's weight of 295g.
Lens Mounts
The 7artisans 12mm F2.8 has the Sony E lens mount whereas the Rokinon 7.5mm f3.5 Fisheye has the Micro Four Thirds 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 OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
7artisans 12mm F2.8 is also available in the Canon EF-M and Fujifilm X mounts.
Focal Range
7artisans 12mm F2.8 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of
18mm when used on a APS-C / DX format camera.
On the other hand, the Rokinon 7.5mm f3.5 Fisheye is a prime lens with fixed focal lenght of 8mm which has an effective (full-frame 35mm equivalent) focal range of 16mm when used on a FourThirds format camera.
