The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Carl Zeiss Distagon T1,4/35 ZM and the Leica Summicron-M 28mm 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. Carl Zeiss Distagon T1,4/35 ZM is the longer of the two lenses at 65mm. The Leica Summicron-M 28mm f2 ASPH with a length of 41mm, is 24mm shorter. Besides being longer, the Carl Zeiss Distagon T1,4/35 ZM also has a larger diameter of 63mm compared to the Leica Summicron-M 28mm 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. Leica Summicron-M 28mm f2 ASPH weighs 270g, 29% (111g) lighter than the Carl Zeiss Distagon T1,4/35 ZM's weight of 381g.
Filter Threads
The Carl Zeiss Distagon T1,4/35 ZM has a filter size of 49mm whereas the Leica Summicron-M 28mm f2 ASPH 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 49mm filters that we recommend you to consider for the Carl Zeiss Distagon T1,4/35 ZM:
And these are the 46mm filters that we recommend for the Leica Summicron-M 28mm f2 ASPH:
Lens Mounts
Both the Carl Zeiss Distagon T1,4/35 ZM and the Leica Summicron-M 28mm 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
Carl Zeiss Distagon T1,4/35 ZM is a prime lens with fixed focal lenght of 35mm.
On the other hand, the Leica Summicron-M 28mm f2 ASPH is a prime lens with fixed focal lenght of 28mm.