The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 70-200mm F2.8 EX DG HSM II and the Rokinon 85mm F1.4 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 70-200mm F2.8 EX DG HSM II is the longer of the two lenses at 184mm. The Rokinon 85mm F1.4 with a length of 75mm, is 109mm shorter. Besides being longer, the Sigma 70-200mm F2.8 EX DG HSM II also has a larger diameter of 87mm 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, 61% (851g) lighter than the Sigma 70-200mm F2.8 EX DG HSM II's weight of 1390g.
Filter Threads
The Sigma 70-200mm F2.8 EX DG HSM II has a filter size of 77mm whereas the Rokinon 85mm F1.4 has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Sigma 70-200mm F2.8 EX DG HSM II:
And these are the 72mm filters that we recommend for the Rokinon 85mm F1.4:
Lens Mounts
Both the Sigma 70-200mm F2.8 EX DG HSM II and the Rokinon 85mm F1.4 has the same Four Thirds lens mount. Some of the latest released cameras that are compatible with the Four Thirds lenses are Olympus E-5, Olympus E-600 and Olympus E-620.
Sigma 70-200mm F2.8 EX DG HSM II is also available in the Canon EF , Pentax KAF3, Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Rokinon 85mm F1.4 is also available in Canon EF , Pentax KAF, Sony Alpha, Samsung NX and Nikon F (FX) mounts.
Focal Range
Sigma 70-200mm F2.8 EX DG HSM II has a focal range of 70-200mm and
2.9X zoom ratio .
On the other hand, the Rokinon 85mm F1.4 is a prime lens with fixed focal lenght of 85mm.
