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 Leica Summilux-M 35mm f1.4 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. Leica Summilux-M 35mm f1.4 ASPH is the longer of the two lenses at 46mm. The Leica Summaron-M 28mm F5.6 with a length of 18mm, is 28mm shorter. Besides being longer, the Leica Summilux-M 35mm f1.4 ASPH also has a larger diameter of 56mm compared to the Leica Summaron-M 28mm F5.6's 51mm 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 Summaron-M 28mm F5.6 weighs 165g, which means it is 155g (48%) lighter than the Leica Summilux-M 35mm f1.4 ASPH which has a weight of 320g.
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 Leica Summaron-M 28mm F5.6 has a filter size of 34mm whereas the Leica Summilux-M 35mm f1.4 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 34mm filters that we recommend you to consider for the Leica Summaron-M 28mm F5.6:
And these are the 46mm filters that we recommend for the Leica Summilux-M 35mm f1.4 ASPH:
Lens Mounts
Both the Leica Summaron-M 28mm F5.6 and the Leica Summilux-M 35mm f1.4 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 Summaron-M 28mm F5.6 is a prime lens with fixed focal lenght of 28mm.
On the other hand, the Leica Summilux-M 35mm f1.4 ASPH is a prime lens with fixed focal lenght of 35mm.