The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 50mm F1.4 FE II 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 FE II is the longer of the two lenses at 89mm. The Sony FE 50mm F1.8 with a length of 60mm, is 29mm shorter. Besides being longer, the Samyang 50mm F1.4 FE II also has a larger diameter of 80mm compared to the Sony FE 50mm F1.8's 69mm diameter.
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, 55% (234g) lighter than the Samyang 50mm F1.4 FE II's weight of 420g.
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
Both the Samyang 50mm F1.4 FE II 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 ZV-E1, Sony A7R V and Sony FX30.
Both lenses have the same focal range of 50mm but while Samyang 50mm F1.4 FE II has the fastest aperture of F1.4, the Sony FE 50mm F1.8's widest aperture value is F1.8.