The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Macro-Elmar-M 90mm f4 and the Leica APO 90mm f2 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Leica APO 90mm f2 ASPH is the longer of the two lenses at 78mm. The Leica Macro-Elmar-M 90mm f4 with a length of 41mm, is 37mm shorter. Besides being longer, the Leica APO 90mm f2 ASPH also has a larger diameter of 64mm compared to the Leica Macro-Elmar-M 90mm f4's 52mm diameter.
The 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 Macro-Elmar-M 90mm f4 weighs 240g, which means it is 260g (52%) lighter than the Leica APO 90mm f2 ASPH which has a weight of 500g.
Both the Leica Macro-Elmar-M 90mm f4 and the Leica APO 90mm 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, Leica M10 and Leica M Typ 262.
Both lenses have the same focal range of 90mm but while Leica Macro-Elmar-M 90mm f4 has the fastest aperture of F4.0, the Leica APO 90mm f2 ASPH's widest aperture value is F2.0.