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 40mm F2.5 G 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 40mm F2.5 G is the longer of the two lenses at 45mm. The Voigtlander SEPTON 40mm f2 with a length of 32mm, is 13mm 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. Sony FE 40mm F2.5 G weighs 173g, 15% (32g) lighter than the Voigtlander SEPTON 40mm f2's weight of 205g.
Filter Threads
The Voigtlander SEPTON 40mm f2 has a filter size of 52mm whereas the Sony FE 40mm F2.5 G 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 40mm F2.5 G:
Lens Mounts
The Voigtlander SEPTON 40mm f2 has the Nikon Z lens mount whereas the Sony FE 40mm F2.5 G has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Voigtlander SEPTON 40mm f2 is also available in the Sony E mount.
Focal Range
Both lenses have the same focal range of
40mm but while Voigtlander SEPTON 40mm f2 has the fastest aperture of
F2.0, the Sony FE 40mm F2.5 G's widest aperture value is
F2.5.
