The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 100mm F2.8 Macro and the Rokinon 85mm F1.4 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 100mm F2.8 Macro is the longer of the two lenses at 123mm. The Rokinon 85mm F1.4 with a length of 75mm, is 48mm shorter. On the other hand, the Rokinon 85mm F1.4 has a larger diameter of 78mm compared to the Samyang 100mm F2.8 Macro's 73mm 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. Rokinon 85mm F1.4 weighs 539g, 25% (181g) lighter than the Samyang 100mm F2.8 Macro's weight of 720g.
Both the Samyang 100mm F2.8 Macro and the Rokinon 85mm F1.4 has the same Samsung NX lens mount. Some of the latest released cameras that are compatible with the Samsung NX lenses are Samsung NX500, Samsung NX1 and Samsung NX3000.
Samyang 100mm F2.8 Macro is also available in Canon EF , Fujifilm X, Micro Four Thirds, Nikon F (FX), Pentax KAF, Sony Alpha and Sony E mounts.
Rokinon 85mm F1.4 is also available in Canon EF , Four Thirds, Pentax KAF, Sony Alpha and Nikon F (FX) mounts.
Samyang 100mm F2.8 Macro is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 150mm.
Rokinon 85mm F1.4 is a prime lens with fixed focal lenght of 85mm.