The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 20mm F1.8 and the Nikon 20mm f1.8G ED for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang 20mm F1.8 is the longer of the two lenses at 88mm. The Nikon 20mm f1.8G ED with a length of 81mm is 7mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 83mm.
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 20mm f1.8G ED weighs 355g, 28% (142g) lighter than the Samyang 20mm F1.8's weight of 497g.
Both Samyang 20mm F1.8 has the Nikon F (FX) lens mount whereas the Nikon 20mm f1.8G 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 D6, Nikon D780 and Nikon D3500 for the Nikon F (DX) Mount.
Samyang 20mm F1.8 is also available in Canon EF , Canon EF-M, Fujifilm X, Micro Four Thirds, Pentax KAF, Samsung NX, Sony Alpha and Sony E mounts.
Both lenses have the same focal range of 20mm and the fastest aperture of F1.8.