The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander SEPTON 40mm f2 and the Viltrox AF 50mm F2.0 Air 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 AF 50mm F2.0 Air is the longer of the two lenses at 59mm. The Voigtlander SEPTON 40mm f2 with a length of 32mm, is 27mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 68mm.
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. Voigtlander SEPTON 40mm f2 weighs 205g, which means it is 15g (6%) lighter than the Viltrox AF 50mm F2.0 Air which has a weight of 220g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Nikon Z Mount for size comparison purposes.
Standard Lenses in Nikon Z Mount for Size Comparison
Filter Threads
The Voigtlander SEPTON 40mm f2 has a filter size of 52mm whereas the Viltrox AF 50mm F2.0 Air has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Voigtlander SEPTON 40mm f2:
And these are the 58mm filters that we recommend for the Viltrox AF 50mm F2.0 Air:
Lens Mounts
Both the Voigtlander SEPTON 40mm f2 and the Viltrox AF 50mm F2.0 Air has the same Nikon Z lens mount. Some of the latest released cameras that are compatible with the Nikon Z lenses are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z.
Voigtlander SEPTON 40mm f2 is also available in the Sony E mount.
Viltrox AF 50mm F2.0 Air is also available in Sony E mount.
Focal Range
Voigtlander SEPTON 40mm f2 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.
On the other hand, the Viltrox AF 50mm F2.0 Air is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75mm.
