The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 85mm F1.4 F and the Sigma 85mm F1.4 DG HSM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 85mm F1.4 DG HSM is the longer of the two lenses at 126mm. The Samyang AF 85mm F1.4 F with a length of 75mm is 51mm shorter. Besides being longer, the Sigma 85mm F1.4 DG HSM also has a larger diameter of 95mm compared to Samyang AF 85mm F1.4 F's 88mm diameter.
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. Samyang AF 85mm F1.4 F weighs 480g, which means it is 650g (57%) lighter than the Sigma 85mm F1.4 DG HSM which has a weight of 1130g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Telephoto Prime Lenses in Nikon F (FX) Mount for Size Comparison
Lens Mounts
Both Samyang AF 85mm F1.4 F and Sigma 85mm F1.4 DG HSM has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Sigma 85mm F1.4 DG HSM is also available in Sigma SA and Canon EF mounts.
Focal Range
Both lenses have the same focal range of 85mm and the fastest aperture of F1.4.