Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang AF 85mm F1.4 FE is the longer of the two lenses at 100mm. The Sigma 85mm F1.4 DG DN with a length of 94mm is 6mm shorter. Besides being longer, the Samyang AF 85mm F1.4 FE also has a larger diameter of 88mm compared to Sigma 85mm F1.4 DG DN 's 83mm 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 FE weighs 568g, 9% (62g) lighter than the Sigma 85mm F1.4 DG DN 's weight of 630g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Sony E Mount for size comparison purposes.
Telephoto Prime Lenses in Sony E Mount for Size Comparison
Both Sigma 85mm F1.4 DG DN and Samyang AF 85mm F1.4 FE has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX30, Sony A7 IV and Sony ZV-E10.
Both lenses have the same focal range of 85mm and the fastest aperture of F1.4.