The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 50mm F1.4 AS UMC and the Sigma 50mm F2.8 EX DG Macro 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. Samyang 50mm F1.4 AS UMC is the longer of the two lenses at 75mm. The Sigma 50mm F2.8 EX DG Macro with a length of 67mm, is 8mm shorter. Besides being longer, the Samyang 50mm F1.4 AS UMC also has a larger diameter of 82mm compared to the Sigma 50mm F2.8 EX DG Macro's 71mm 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 50mm F2.8 EX DG Macro weighs 320g, 40% (215g) lighter than the Samyang 50mm F1.4 AS UMC's weight of 535g.
Filter Threads
The Samyang 50mm F1.4 AS UMC has a filter size of 77mm whereas the Sigma 50mm F2.8 EX DG Macro has a 55mm 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 Samyang 50mm F1.4 AS UMC:
And these are the 55mm filters that we recommend for the Sigma 50mm F2.8 EX DG Macro:
Lens Mounts
Both the Samyang 50mm F1.4 AS UMC and the Sigma 50mm F2.8 EX DG Macro has the same Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.
Samyang 50mm F1.4 AS UMC is also available in Canon EF , Nikon F (FX), Sony Alpha and Sony E mounts.
Sigma 50mm F2.8 EX DG Macro is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Focal Range
Both lenses have the same focal range of
50mm but while Samyang 50mm F1.4 AS UMC has the fastest aperture of
F1.4, the Sigma 50mm F2.8 EX DG Macro's widest aperture value is
F2.8.