The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28mm F1.4 DG HSM A and the Rokinon T-S 24mm f3.5 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 T-S 24mm f3.5 is the longer of the two lenses at 112mm. The Sigma 28mm F1.4 DG HSM A with a length of 108mm, is 4mm shorter. Besides being longer, the Rokinon T-S 24mm f3.5 also has a larger diameter of 86mm compared to the Sigma 28mm F1.4 DG HSM A's 83mm 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 T-S 24mm f3.5 weighs 680g, 21% (185g) lighter than the Sigma 28mm F1.4 DG HSM A's weight of 865g.
Filter Threads
The Sigma 28mm F1.4 DG HSM A has a filter size of 77mm whereas the Rokinon T-S 24mm f3.5 has a 82mm 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 28mm F1.4 DG HSM A:
And these are the 82mm filters that we recommend for the Rokinon T-S 24mm f3.5:
Lens Mounts
Both the Sigma 28mm F1.4 DG HSM A and the Rokinon T-S 24mm f3.5 has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Sigma 28mm F1.4 DG HSM A is also available in Canon EF , Sigma SA, Sony E and Leica L mounts.
Rokinon T-S 24mm f3.5 is also available in Canon EF and Sony Alpha mounts.
Focal Range
Sigma 28mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42mm.
On the other hand, the Rokinon T-S 24mm f3.5 is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36mm.