Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang 35mm F1.2 is the longer of the two lenses at 74mm. The Sony FE 35mm F1.8 with a length of 73mm is 1mm shorter. Besides being longer, the Samyang 35mm F1.2 also has a larger diameter of 68mm compared to Sony FE 35mm F1.8's 66mm diameter.
Below you can find the scaled side by side image of Sony FE 35mm F1.8 and Samyang 35mm F1.2 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. Sony FE 35mm F1.8 weighs 280g, which means it is 140g (33%) lighter than the Samyang 35mm F1.2 which has a weight of 420g.
Below you can find the dimension and weight table of the 'Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Wideangle Prime Lenses in Sony E Mount for Size Comparison
Both Sony FE 35mm F1.8 and Samyang 35mm F1.2 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.
Samyang 35mm F1.2 is also available in Canon EF-M , Fujifilm X and Micro Four Thirds mounts.