The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Rokinon 85mm F1.4 and the Sigma 85mm F1.4 EX DG HSM for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 85mm F1.4 EX DG HSM is the longer of the two lenses at 88mm. The Rokinon 85mm F1.4 with a length of 75mm, is 13mm shorter. Besides being longer, the Sigma 85mm F1.4 EX DG HSM also has a larger diameter of 86mm compared to the Rokinon 85mm F1.4's 78mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Rokinon 85mm F1.4 weighs 539g, which means it is 186g (25%) lighter than the Sigma 85mm F1.4 EX DG HSM which has a weight of 725g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Sony Alpha Mount for size comparison purposes.
Telephoto Lenses in Sony Alpha Mount for Size Comparison
Filter Threads
The Rokinon 85mm F1.4 has a filter size of 72mm whereas the Sigma 85mm F1.4 EX DG HSM has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Rokinon 85mm F1.4:
And these are the 77mm filters that we recommend for the Sigma 85mm F1.4 EX DG HSM:
Lens Mounts
Both the Rokinon 85mm F1.4 and the Sigma 85mm F1.4 EX DG HSM 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.
Rokinon 85mm F1.4 is also available in Canon EF , Four Thirds, Pentax KAF, Samsung NX and Nikon F (FX) mounts.
Sigma 85mm F1.4 EX DG HSM is also available in Canon EF , Nikon F (FX), Pentax KAF3 and Sigma SA mounts.
Focal Range
Both lenses have the same focal range of
85mm and the fastest aperture of
F1.4.