The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 75mm f1.2 AF and the Samyang 50mm F1.2 AS UMC CS 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. Viltrox 75mm f1.2 AF is the longer of the two lenses at 101mm. The Samyang 50mm F1.2 AS UMC CS with a length of 74mm, is 27mm shorter. Besides being longer, the Viltrox 75mm f1.2 AF also has a larger diameter of 87mm compared to the Samyang 50mm F1.2 AS UMC CS's 68mm 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. Samyang 50mm F1.2 AS UMC CS weighs 375g, 44% (295g) lighter than the Viltrox 75mm f1.2 AF's weight of 670g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Fujifilm X Mount for size comparison purposes.
Telephoto Lenses in Fujifilm X Mount for Size Comparison
Filter Threads
The Viltrox 75mm f1.2 AF has a filter size of 77mm whereas the Samyang 50mm F1.2 AS UMC CS 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 77mm filters that we recommend you to consider for the Viltrox 75mm f1.2 AF:
And these are the 62mm filters that we recommend for the Samyang 50mm F1.2 AS UMC CS:
Lens Mounts
Both the Viltrox 75mm f1.2 AF and the Samyang 50mm F1.2 AS UMC CS 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.
Viltrox 75mm f1.2 AF is also available in the Sony E and Nikon Z mounts.
Samyang 50mm F1.2 AS UMC CS is also available in Canon EF-M , Micro Four Thirds and Sony E mounts.
Focal Range
Viltrox 75mm f1.2 AF is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a APS-C / DX format camera.
On the other hand, the Samyang 50mm F1.2 AS UMC CS is a prime lens with fixed focal lenght of 50mm which has an effective (full-frame 35mm equivalent) focal range of 75mm when used on a APS-C / DX format camera.
