The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica APO-SL 90mm F2 ASPH and the Leica APO 135mm f3.4 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 APO 135mm f3.4 ASPH is the longer of the two lenses at 105mm. The Leica APO-SL 90mm F2 ASPH with a length of 102mm, is 3mm shorter. On the other hand, the Leica APO-SL 90mm F2 ASPH has a larger diameter of 73mm compared to the Leica APO 135mm f3.4 ASPH's 59mm 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 APO 135mm f3.4 ASPH weighs 450g, 35% (250g) lighter than the Leica APO-SL 90mm F2 ASPH's weight of 700g.
Filter Threads
The Leica APO-SL 90mm F2 ASPH has a filter size of 67mm whereas the Leica APO 135mm f3.4 ASPH has a 49mm 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 APO-SL 90mm F2 ASPH:
And these are the 49mm filters that we recommend for the Leica APO 135mm f3.4 ASPH:
Lens Mounts
The Leica APO-SL 90mm F2 ASPH has the Leica L lens mount whereas the Leica APO 135mm f3.4 ASPH has the Leica M lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Leica M EV1, Leica M11-D and Pixii Max for the Leica M Mount.
Focal Range
Leica APO-SL 90mm F2 ASPH is a prime lens with fixed focal lenght of 90mm.
On the other hand, the Leica APO 135mm f3.4 ASPH is a prime lens with fixed focal lenght of 135mm.
