The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 20mm F3.5 SL II and the Carl Zeiss C Biogon T4,5/21 ZM 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. Carl Zeiss C Biogon T4,5/21 ZM is the longer of the two lenses at 56mm. The Voigtlander 20mm F3.5 SL II with a length of 29mm, is 27mm shorter. On the other hand, the Voigtlander 20mm F3.5 SL II has a larger diameter of 63mm compared to the Carl Zeiss C Biogon T4,5/21 ZM's 53mm 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 20mm F3.5 SL II weighs 205g, which means it is 5g (2%) lighter than the Carl Zeiss C Biogon T4,5/21 ZM which has a weight of 210g.
Filter Threads
The Voigtlander 20mm F3.5 SL II has a filter size of 52mm whereas the Carl Zeiss C Biogon T4,5/21 ZM 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 20mm F3.5 SL II:
And these are the 46mm filters that we recommend for the Carl Zeiss C Biogon T4,5/21 ZM:
Lens Mounts
The Voigtlander 20mm F3.5 SL II has the Canon EF lens mount whereas the Carl Zeiss C Biogon T4,5/21 ZM has the Leica M 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 Leica M EV1, Leica M11-D and Pixii Max for the Leica M Mount.
Voigtlander 20mm F3.5 SL II is also available in the Nikon F (FX) and Pentax KAF mounts.
Focal Range
Voigtlander 20mm F3.5 SL II is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
32mm.
On the other hand, the Carl Zeiss C Biogon T4,5/21 ZM is a prime lens with fixed focal lenght of 21mm.
