The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 9mm F2.8 X and the Samyang 20mm F1.8 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 20mm F1.8 is the longer of the two lenses at 88mm. The Viltrox 9mm F2.8 X with a length of 56mm, is 32mm shorter. Besides being longer, the Samyang 20mm F1.8 also has a larger diameter of 83mm compared to the Viltrox 9mm F2.8 X's 65mm 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. Viltrox 9mm F2.8 X weighs 175g, which means it is 322g (64%) lighter than the Samyang 20mm F1.8 which has a weight of 497g.
Filter Threads
The Viltrox 9mm F2.8 X has a filter size of 58mm whereas the Samyang 20mm F1.8 has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Viltrox 9mm F2.8 X:
And these are the 77mm filters that we recommend for the Samyang 20mm F1.8:
Lens Mounts
The Viltrox 9mm F2.8 X has the Fujiflm X lens mount whereas the Samyang 20mm F1.8 has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujiflm X Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
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.
Focal Range
Viltrox 9mm F2.8 X is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of
13.5mm when used on a APS-C / DX format camera.
On the other hand, the Samyang 20mm F1.8 is a prime lens with fixed focal lenght of 20mm.
