The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24mm F1.8 EX DG and the Samyang 16mm f2.0 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Samyang 16mm f2.0 is the longer of the two lenses at 89mm. The Sigma 24mm F1.8 EX DG with a length of 83mm, is 6mm shorter. On the other hand, the Sigma 24mm F1.8 EX DG has a larger diameter of 84mm compared to the Samyang 16mm f2.0's 83mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sigma 24mm F1.8 EX DG weighs 485g, which means it is 98g (16%) lighter than the Samyang 16mm f2.0 which has a weight of 583g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Four Thirds Mount for size comparison purposes.
Wideangle Prime Lenses in Four Thirds Mount for Size Comparison
Both the Sigma 24mm F1.8 EX DG and the Samyang 16mm f2.0 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 24mm F1.8 EX DG is also available in Canon EF , Nikon F (FX), Pentax KAF, Sony Alpha, Sigma SA, Canon EF, Pentax KAF, Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Samyang 16mm f2.0 is also available in Canon EF , Canon EF-M, Fujifilm X, Nikon F (DX), Micro Four Thirds, Pentax KAF, Sony Alpha, Sony E and Samsung NX mounts.
Sigma 24mm F1.8 EX DG is a prime lens with fixed focal lenght of 24mm. Samyang 16mm f2.0 is a prime lens with fixed focal lenght of 16mm which has an effective (full-frame 35mm equivalent) focal range of 24mm when used on a APS-C / DX format camera.