The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 90mm F2.8 Macro G OSS and the Samyang 85mm F1.4 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sony FE 90mm F2.8 Macro G OSS is the longer of the two lenses at 131mm. The Samyang 85mm F1.4 with a length of 75mm is 56mm shorter. Besides being longer, the Sony FE 90mm F2.8 Macro G OSS also has a larger diameter of 79mm compared to Samyang 85mm F1.4's 78mm 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 F1.4 weighs 539g, 10% (63g) lighter than the Sony FE 90mm F2.8 Macro G OSS's weight of 602g.
Lens Mounts
Both Sony FE 90mm F2.8 Macro G OSS and Samyang 85mm F1.4 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 85mm F1.4 is also available in Canon EF , Nikon F (FX), Four Thirds, Pentax KAF, Sony Alpha and Samsung NX mounts.
Focal Range
Sony FE 90mm F2.8 Macro G OSS is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 135mm.
Samyang 85mm F1.4 is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 127.5mm.