The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 28mm F2 Ultron and the Carl Zeiss Biogon T2,8/25 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 Biogon T2,8/25 ZM is the longer of the two lenses at 71mm. The Voigtlander 28mm F2 Ultron with a length of 51mm, is 20mm shorter. On the other hand, the Voigtlander 28mm F2 Ultron has a larger diameter of 55mm compared to the Carl Zeiss Biogon T2,8/25 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 28mm F2 Ultron weighs 244g, which means it is 16g (6%) lighter than the Carl Zeiss Biogon T2,8/25 ZM which has a weight of 260g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica M Mount for size comparison purposes.
Wideangle Lenses in Leica M Mount for Size Comparison
Filter Threads
Both the Voigtlander 28mm F2 Ultron and the Carl Zeiss Biogon T2,8/25 ZM have the same Filter thread size of 46mm.
Below are links to the 46mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Voigtlander 28mm F2 Ultron and the Carl Zeiss Biogon T2,8/25 ZM has the same Leica M lens mount. Some of the latest released cameras that are compatible with the Leica M lenses are Leica M11 Monochrome, Leica M11 and Leica M10.
Focal Range
Voigtlander 28mm F2 Ultron is a prime lens with fixed focal lenght of 28mm.
On the other hand, the Carl Zeiss Biogon T2,8/25 ZM is a prime lens with fixed focal lenght of 25mm.