The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 21mm F1.4 ED AS UMC CS and the Fujifilm 18mm F2 R 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 21mm F1.4 ED AS UMC CS is the longer of the two lenses at 68mm. The Fujifilm 18mm F2 R with a length of 41mm, is 27mm shorter. On the other hand, the Fujifilm 18mm F2 R has a larger diameter of 65mm compared to the Samyang 21mm F1.4 ED AS UMC CS's 64mm diameter.
Below you can find a scaled side-by-side image of Samyang 21mm F1.4 ED AS UMC CS and Fujifilm 18mm F2 R to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 21mm F1.4 ED AS UMC CS and the Fujifilm 18mm F2 R Size and Weight 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. Fujifilm 18mm F2 R weighs 116g, 57% (159g) lighter than the Samyang 21mm F1.4 ED AS UMC CS's weight of 275g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Fujifilm X Mount for size comparison purposes.
Wideangle Fujifilm X Mount
Lens Mounts
Both the Samyang 21mm F1.4 ED AS UMC CS and the Fujifilm 18mm F2 R has the same Fujifilm X lens mount . Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 .
Canon EF-M , Micro Four Thirds and Sony E mounts.
Focal Range
Samyang 21mm F1.4 ED AS UMC CS is a prime lens with fixed focal lenght of 21mm which has an effective (full-frame 35mm equivalent) focal range of
31.5mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm 18mm F2 R is a prime lens with fixed focal lenght of 18mm which has an effective (full-frame 35mm equivalent) focal range of 27mm when used on a APS-C / DX format camera.
