The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Summarit-M 75mm F2.4 ASPH and the Leica Summarit-M 90mm f2.5 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Leica Summarit-M 90mm f2.5 is the longer of the two lenses at 67mm. The Leica Summarit-M 75mm F2.4 ASPH with a length of 61mm is 6mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 55mm.
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 Summarit-M 75mm F2.4 ASPH weighs 325g, which means it is 35g (9%) lighter than the Leica Summarit-M 90mm f2.5 which has a weight of 360g.
Both Leica Summarit-M 75mm F2.4 ASPH and Leica Summarit-M 90mm f2.5 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 Summarit-M 75mm F2.4 ASPH is a prime lens with fixed focal lenght of 75mm. Leica Summarit-M 90mm f2.5 is a prime lens with fixed focal lenght of 90mm.