The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang MF 14mm F2.8 Mk2 and the Nikon DX Fisheye-10.5mm f2.8G ED for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Samyang MF 14mm F2.8 Mk2 is the longer of the two lenses at 96mm. The Nikon DX Fisheye-10.5mm f2.8G ED with a length of 63mm, is 33mm shorter. Besides being longer, the Samyang MF 14mm F2.8 Mk2 also has a larger diameter of 87mm compared to the Nikon DX Fisheye-10.5mm f2.8G ED's 63mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Nikon DX Fisheye-10.5mm f2.8G ED weighs 300g, 53% (349g) lighter than the Samyang MF 14mm F2.8 Mk2's weight of 649g.
Lens Mounts
The Samyang MF 14mm F2.8 Mk2 has the Nikon F (FX) lens mount whereas the Nikon DX Fisheye-10.5mm f2.8G ED has the Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Samyang MF 14mm F2.8 Mk2 is also available in Canon EF , Canon EF-M, Fujifilm X, Micro Four Thirds and Sony E mounts.
Focal Range
Samyang MF 14mm F2.8 Mk2 is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 21mm.
Nikon DX Fisheye-10.5mm f2.8G ED is a prime lens with fixed focal lenght of 11mm which has an effective (full-frame 35mm equivalent) focal range of 16.5mm when used on a APS-C / DX format camera.