The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Summarit-M 35mm f2.5 and the Leica Elmarit-M 28mm f2.8 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Leica Summarit-M 35mm f2.5 is the longer of the two lenses at 34mm. The Leica Elmarit-M 28mm f2.8 ASPH with a length of 30mm, is 4mm shorter. On the other hand, the Leica Elmarit-M 28mm f2.8 ASPH has a larger diameter of 52mm compared to the Leica Summarit-M 35mm f2.5's 51mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Leica Elmarit-M 28mm f2.8 ASPH weighs 180g, 18% (40g) lighter than the Leica Summarit-M 35mm f2.5's weight of 220g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica M Mount for size comparison purposes.
Wideangle Prime Lenses in Leica M Mount for Size Comparison
Lens Mounts
Both the Leica Summarit-M 35mm f2.5 and the Leica Elmarit-M 28mm f2.8 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
Leica Summarit-M 35mm f2.5 is a prime lens with fixed focal lenght of 25-35mm. Leica Elmarit-M 28mm f2.8 ASPH is a prime lens with fixed focal lenght of 28mm.