The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 40mm F2 SL II and the Fujifilm 18mm F2 R 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. Fujifilm 18mm F2 R is the longer of the two lenses at 41mm. The Voigtlander 40mm F2 SL II with a length of 25mm, is 16mm shorter. Besides being longer, the Fujifilm 18mm F2 R also has a larger diameter of 65mm compared to the Voigtlander 40mm F2 SL II's 63mm 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. Fujifilm 18mm F2 R weighs 116g, 42% (84g) lighter than the Voigtlander 40mm F2 SL II's weight of 200g.
Lens Mounts
The Voigtlander 40mm F2 SL II has the Canon EF lens mount whereas the Fujifilm 18mm F2 R has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Voigtlander 40mm F2 SL II is also available in the Nikon F (FX) and Pentax KAF mounts.
Focal Range
Voigtlander 40mm F2 SL II is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
64mm.
On the other hand, the Fujifilm 18mm F2 R is a prime lens with fixed focal lenght of 18mm which has an effective (full-frame 35mm equivalent) focal range of 27mm when used on a APS-C / DX format camera.
