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 Sony FE 50mm 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. Sony FE 50mm F1.8 is the longer of the two lenses at 60mm. The Voigtlander SEPTON 40mm f2 with a length of 30mm, is 30mm shorter. Besides being longer, the Sony FE 50mm F1.8 also has a larger diameter of 69mm compared to the Voigtlander SEPTON 40mm f2's 62mm 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. Voigtlander SEPTON 40mm f2 weighs 165g, which means it is 21g (11%) lighter than the Sony FE 50mm F1.8 which has a weight of 186g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Voigtlander SEPTON 40mm f2 has a filter size of 52mm whereas the Sony FE 50mm F1.8 has a 49mm 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 49mm filters that we recommend for the Sony FE 50mm F1.8:
Lens Mounts
Both the Voigtlander SEPTON 40mm f2 and the Sony FE 50mm F1.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Voigtlander SEPTON 40mm f2 is also available in the Nikon Z 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 Sony FE 50mm F1.8 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.
