The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 50mm F1.4 AS UMC and the Sony FE 50mm F1.8 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Samyang 50mm F1.4 AS UMC is the longer of the two lenses at 75mm. The Sony FE 50mm F1.8 with a length of 60mm, is 15mm shorter. Besides being longer, the Samyang 50mm F1.4 AS UMC also has a larger diameter of 82mm compared to the Sony FE 50mm F1.8's 69mm diameter.
Below you can find a scaled side-by-side image of Samyang 50mm F1.4 AS UMC and Sony FE 50mm F1.8 to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 50mm F1.4 AS UMC and the Sony FE 50mm F1.8 Size and Weight The 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 50mm F1.8 weighs 186g, 65% (349g) lighter than the Samyang 50mm F1.4 AS UMC's weight of 535g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Prime Lenses in Sony E Mount for Size Comparison
Lens Mounts
Both the Samyang 50mm F1.4 AS UMC and the Sony FE 50mm F1.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A7R V, Sony FX30 and Sony A7 IV.
Samyang 50mm F1.4 AS UMC is also available in Canon EF , Nikon F (FX), Pentax KAF and Sony Alpha mounts.
Focal Range
Both lenses have the same focal range of 50mm but while Samyang 50mm F1.4 AS UMC has the fastest aperture of F1.4, the Sony FE 50mm F1.8's widest aperture value is F1.8.