The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 15mm F1.7 X and the Samyang AF 12mm f2 RF-S 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 AF 12mm f2 RF-S is the longer of the two lenses at 63mm. The Viltrox 15mm F1.7 X with a length of 56mm, is 7mm shorter. Besides being longer, the Samyang AF 12mm f2 RF-S also has a larger diameter of 70mm compared to the Viltrox 15mm F1.7 X's 65mm diameter.
Below you can find a scaled side-by-side image of Viltrox 15mm F1.7 X and Samyang AF 12mm f2 RF-S to get a better idea of how their sizes compare in real life.
Comparison image of the Viltrox 15mm F1.7 X and the Samyang AF 12mm f2 RF-S 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. Viltrox 15mm F1.7 X weighs 180g, which means it is 33g (15%) lighter than the Samyang AF 12mm f2 RF-S which has a weight of 213g.
Filter Threads
The Viltrox 15mm F1.7 X has a filter size of 58mm whereas the Samyang AF 12mm f2 RF-S has a 62mm 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 15mm F1.7 X:
And these are the 62mm filters that we recommend for the Samyang AF 12mm f2 RF-S:
Lens Mounts
The Viltrox 15mm F1.7 X has the Fujifilm X lens mount whereas the Samyang AF 12mm f2 RF-S has the Canon RF 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 Fujifilm X Mount and Canon R50 V , Canon R100 and Canon R50 for the Canon RF Mount.
Focal Range
Viltrox 15mm F1.7 X is a prime lens with fixed focal lenght of 15mm which has an effective (full-frame 35mm equivalent) focal range of
22.5mm when used on a APS-C / DX format camera.
On the other hand, the Samyang AF 12mm f2 RF-S is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of 19.2mm when used on a APS-C / DX format camera.
