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 7artisans 25mm 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. 7artisans 25mm F1.8 is the longer of the two lenses at 32mm. The Voigtlander SEPTON 40mm f2 with a length of 30mm, is 2mm shorter. On the other hand, the Voigtlander SEPTON 40mm f2 has a larger diameter of 62mm compared to the 7artisans 25mm F1.8's 51mm 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. 7artisans 25mm F1.8 weighs 143g, 13% (22g) lighter than the Voigtlander SEPTON 40mm f2's weight of 165g.
Filter Threads
The Voigtlander SEPTON 40mm f2 has a filter size of 52mm whereas the 7artisans 25mm F1.8 has a 46mm 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 46mm filters that we recommend for the 7artisans 25mm F1.8:
Lens Mounts
The Voigtlander SEPTON 40mm f2 has the Sony E lens mount whereas the 7artisans 25mm F1.8 has the Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
Voigtlander SEPTON 40mm f2 is also available in the Nikon Z mount.
7artisans 25mm F1.8 is also available in Canon EF-M , Fujifilm X and Sony E mounts.
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 7artisans 25mm F1.8 is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of 50mm when used on a APS-C / DX format camera.
