The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina atx-m 23mm F1.4 X and the Samyang 20mm F1.8 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang 20mm F1.8 is the longer of the two lenses at 88mm. The Tokina atx-m 23mm F1.4 X with a length of 72mm is 16mm shorter. Besides being longer, the Samyang 20mm F1.8 also has a larger diameter of 83mm compared to Tokina atx-m 23mm F1.4 X's 65mm diameter.
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. Tokina atx-m 23mm F1.4 X weighs 276g, which means it is 221g (44%) lighter than the Samyang 20mm F1.8 which has a weight of 497g.
Below you can find the dimension and weight table of the 'Wideangle Prime Lenses in Fujifilm X Mount for size comparison purposes.
Wideangle Prime Lenses in Fujifilm X Mount for Size Comparison
Both Tokina atx-m 23mm F1.4 X and Samyang 20mm F1.8 has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T5, Fujifilm X-H2 and Fujifilm X-H2S.
Samyang 20mm F1.8 is also available in Canon EF , Canon EF-M, Micro Four Thirds, Nikon F (FX), Pentax KAF, Samsung NX, Sony Alpha and Sony E mounts.
Tokina atx-m 23mm F1.4 X is a prime lens with fixed focal lenght of 23mm which has an effective (full-frame 35mm equivalent) focal range of 34.5mm when used on a APS-C / DX format camera. Samyang 20mm F1.8 is a prime lens with fixed focal lenght of 20mm.