The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 24mm f1.4 and the Sigma 24mm F1.8 EX DG for their suitability to various photography scenarios:
Size and Weight Comparison
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 24mm F1.8 EX DG weighs 485g, 16% (95g) lighter than the Samyang 24mm f1.4's weight of 580g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony Alpha Mount for size comparison purposes.
Wideangle Lenses in Sony Alpha Mount for Size Comparison
Filter Threads
Both the Samyang 24mm f1.4 and the Sigma 24mm F1.8 EX DG have the same Filter thread size of 77mm.
Below are links to the 77mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Samyang 24mm f1.4 and the Sigma 24mm F1.8 EX DG 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.
Samyang 24mm f1.4 is also available in Canon EF , Nikon F (FX), Four Thirds, Pentax KAF, Sony E and Samsung NX mounts.
Sigma 24mm F1.8 EX DG is also available in Canon EF , Nikon F (FX), Four Thirds, Pentax KAF, Sigma SA, Canon EF, Pentax KAF, Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Focal Range
Both lenses have the same focal range of
24mm but while Samyang 24mm f1.4 has the fastest aperture of
F1.4, the Sigma 24mm F1.8 EX DG's widest aperture value is
F1.8.