The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Summaron-M 28mm F5.6 and the Carl Zeiss C Biogon T2,8/35 ZM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Carl Zeiss C Biogon T2,8/35 ZM is the longer of the two lenses at 55mm. The Leica Summaron-M 28mm F5.6 with a length of 18mm is 37mm shorter. Besides being longer, the Carl Zeiss C Biogon T2,8/35 ZM also has a larger diameter of 52mm compared to Leica Summaron-M 28mm F5.6's 51mm diameter.
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 Summaron-M 28mm F5.6 weighs 165g, which means it is 35g (17%) lighter than the Carl Zeiss C Biogon T2,8/35 ZM which has a weight of 200g.
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
Both Leica Summaron-M 28mm F5.6 and Carl Zeiss C Biogon T2,8/35 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, Leica M10 and Leica M Typ 262.
Leica Summaron-M 28mm F5.6 is a prime lens with fixed focal lenght of 28mm. Carl Zeiss C Biogon T2,8/35 ZM is a prime lens with fixed focal lenght of 35mm.