The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 56mm F1.4 C 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. Rokinon 85mm F1.4 is the longer of the two lenses at 75mm. The Sigma 56mm F1.4 C with a length of 60mm, is 15mm shorter. Besides being longer, the Rokinon 85mm F1.4 also has a larger diameter of 78mm compared to the Sigma 56mm F1.4 C's 67mm 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. Sigma 56mm F1.4 C weighs 280g, which means it is 259g (48%) lighter than the Rokinon 85mm F1.4 which has a weight of 539g.
Filter Threads
The Sigma 56mm F1.4 C has a filter size of 55mm 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 55mm filters that we recommend you to consider for the Sigma 56mm F1.4 C:
And these are the 72mm filters that we recommend for the Rokinon 85mm F1.4:
Lens Mounts
The Sigma 56mm F1.4 C has the Fujifilm X lens mount whereas the Rokinon 85mm F1.4 has the Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Olympus E-5, Olympus E-600 and Olympus E-620 for the Four Thirds Mount.
Sigma 56mm F1.4 C is also available in the Nikon Z and Canon RF 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 56mm F1.4 C is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of
84mm when used on a APS-C / DX format camera.
On the other hand, the Rokinon 85mm F1.4 is a prime lens with fixed focal lenght of 85mm.
