Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang MF 85mm F1.4 Z is the longer of the two lenses at 103mm. The Nikon Z 85mm F1.8 S with a length of 99mm is 4mm shorter. Besides being longer, the Samyang MF 85mm F1.4 Z also has a larger diameter of 78mm compared to Nikon Z 85mm F1.8 S's 75mm diameter.
Below you can find the scaled side by side image of Samyang MF 85mm F1.4 Z and Nikon Z 85mm F1.8 S to get a better idea of how their size compare in real life.
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 Z 85mm F1.8 S weighs 470g, 57% (270g) lighter than the Samyang MF 85mm F1.4 Z's weight of 740g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Nikon Z Mount for size comparison purposes.
Telephoto Prime Lenses in Nikon Z Mount for Size Comparison
Both Samyang MF 85mm F1.4 Z and Nikon Z 85mm F1.8 S has the same Nikon Z lens mount. Some of the latest released cameras that are compatible with the Nikon Z lenses are Nikon Z30, Nikon Z9 and Nikon Z fc.