The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Noctilux-M 75mm F1.25 ASPH and the Leica Summarit-M 75mm F2.4 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 Noctilux-M 75mm F1.25 ASPH is the longer of the two lenses at 91mm. The Leica Summarit-M 75mm F2.4 ASPH with a length of 61mm, is 30mm shorter. Besides being longer, the Leica Noctilux-M 75mm F1.25 ASPH also has a larger diameter of 74mm compared to the Leica Summarit-M 75mm F2.4 ASPH's 55mm diameter.
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Below you can find a scaled side-by-side image of Leica Noctilux-M 75mm F1.25 ASPH and Leica Summarit-M 75mm F2.4 ASPH to get a better idea of how their sizes compare in real life.
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 Summarit-M 75mm F2.4 ASPH weighs 325g, 69% (730g) lighter than the Leica Noctilux-M 75mm F1.25 ASPH's weight of 1055g.
Filter Threads
The Leica Noctilux-M 75mm F1.25 ASPH has a filter size of 67mm whereas the Leica Summarit-M 75mm F2.4 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 67mm filters that we recommend you to consider for the Leica Noctilux-M 75mm F1.25 ASPH:
And these are the 46mm filters that we recommend for the Leica Summarit-M 75mm F2.4 ASPH:
Lens Mounts
Both the Leica Noctilux-M 75mm F1.25 ASPH and the Leica Summarit-M 75mm F2.4 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
Both lenses have the same focal range of
75mm but while Leica Noctilux-M 75mm F1.25 ASPH has the fastest aperture of
F1.2, the Leica Summarit-M 75mm F2.4 ASPH's widest aperture value is
F2.4.