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 Leica Summicron-M 35mm f2 ASPH 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. Voigtlander 28mm F2 Ultron is the longer of the two lenses at 51mm. The Leica Summicron-M 35mm f2 ASPH with a length of 35mm, is 16mm shorter. Besides being longer, the Voigtlander 28mm F2 Ultron also has a larger diameter of 55mm compared to the Leica Summicron-M 35mm f2 ASPH'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 11g (4%) lighter than the Leica Summicron-M 35mm f2 ASPH which has a weight of 255g.
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
The Voigtlander 28mm F2 Ultron has a filter size of 46mm whereas the Leica Summicron-M 35mm f2 ASPH has a 39mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 46mm filters that we recommend you to consider for the Voigtlander 28mm F2 Ultron:
And these are the 39mm filters that we recommend for the Leica Summicron-M 35mm f2 ASPH:
Lens Mounts
Both the Voigtlander 28mm F2 Ultron and the Leica Summicron-M 35mm f2 ASPH 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 Leica Summicron-M 35mm f2 ASPH is a prime lens with fixed focal lenght of 35mm.