The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 75mm F1.8 X and the Viltrox AF 40mm f2.5 Z 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 75mm F1.8 X is the longer of the two lenses at 69mm. The Viltrox AF 40mm f2.5 Z with a length of 56mm, is 13mm shorter. Besides being longer, the Samyang AF 75mm F1.8 X also has a larger diameter of 70mm compared to the Viltrox AF 40mm f2.5 Z's 68mm diameter.
Below you can find a scaled side-by-side image of Samyang AF 75mm F1.8 X and Viltrox AF 40mm f2.5 Z to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang AF 75mm F1.8 X and the Viltrox AF 40mm f2.5 Z 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 AF 40mm f2.5 Z weighs 180g, 29% (77g) lighter than the Samyang AF 75mm F1.8 X's weight of 257g.
Filter Threads
The Samyang AF 75mm F1.8 X has a filter size of 62mm whereas the Viltrox AF 40mm f2.5 Z has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Samyang AF 75mm F1.8 X:
And these are the 52mm filters that we recommend for the Viltrox AF 40mm f2.5 Z:
Lens Mounts
The Samyang AF 75mm F1.8 X has the Fujifilm X lens mount whereas the Viltrox AF 40mm f2.5 Z has the Nikon Z 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 Nikon ZR , Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount.
Focal Range
Samyang AF 75mm F1.8 X is a prime lens with fixed focal lenght of 75mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
112.5mm .
On the other hand, the Viltrox AF 40mm f2.5 Z is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 60mm .
