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 Samyang 85mm F1.8 ED UMC CS with a length of 81mm is 19mm shorter. Besides being longer, the Samyang AF 85mm F1.4 FE also has a larger diameter of 88mm compared to Samyang 85mm F1.8 ED UMC CS's 68mm 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 85mm F1.8 ED UMC CS weighs 344g, which means it is 224g (39%) lighter than the Samyang AF 85mm F1.4 FE which has a weight of 568g.
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 Samyang 85mm F1.8 ED UMC CS 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 ZV-E10, Sony A6600 and Sony A6100.
Samyang 85mm F1.8 ED UMC CS is also available in Canon EF-M and Fujifilm X mounts.