The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 90mm F2.8 VC Macro and the Rokinon 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.Tamron 90mm F2.8 VC Macro is the longer of the two lenses at 117mm. The Rokinon 85mm F1.4 with a length of 75mm is 42mm shorter. Besides being longer, the Tamron 90mm F2.8 VC Macro also has a larger diameter of 79mm compared to Rokinon 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. Rokinon 85mm F1.4 weighs 539g, 11% (70g) lighter than the Tamron 90mm F2.8 VC Macro's weight of 609g.
Lens Mounts
Both Tamron 90mm F2.8 VC Macro and Rokinon 85mm F1.4 has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Tamron 90mm F2.8 VC Macro is also available in Nikon F (FX) and Canon EF mounts.
Rokinon 85mm F1.4 is also available in Canon EF , Four Thirds, Pentax KAF, Samsung NX and Nikon F (FX) mounts.
Focal Range
Tamron 90mm F2.8 VC Macro 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.
Rokinon 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.