This is a record of using the APO-SUMMICRON-M 90mm F2 ASPH. a medium telephoto lens for the Leica M, with a digital camera.

Table of contents

Photo example by LEICA M9

I had been using the Voigtlander Apo-lanther 3.5/90mm and the Summicron 2/90mm as my 90mm focal length lenses, Both lenses were used infrequently with rangefinder cameras due to focusing accuracy problems, and I soon outgrew them.
I started to lean toward R lenses, but the R-type Apo Summicron 2/90 asph. was hard to find, so I decided to get an M-type Apo Summicron and use it.
The viewfinder of the digital M was not as accurate as that of the Apo Summicron 75mm at maximum aperture, so I started using the LEICA M with an EVF. The magnified viewfinder of the EVF made me less worried about the focusing accuracy, and I thought it was a good time to use telephoto lenses.

Later, I also acquired an R-type Apo Summicron 90mm lens, and I was torn between which one to keep, but since mirrorless lenses were not in their heyday at the time, I decided to keep the R-type Apo Summicron because it had the advantage of a minimum focusing distance of 0.7m and a long flange back, which meant it could be used with a variety of cameras.

When I owned both the M-mount and R-mount APO-SUMMICRON lenses at the same time, I posted similar images when I went out shooting with both. Although the slightly different shooting positions do not allow for an exact comparison, each has its own character when you look at the details.


Medium telephoto lens for LEICA M-type.
Released in 1998, this lens is still in service as of 2022.
It has an aspherical lens and a built-in hood, and conforms to the Leica Modern lens standard.
Lens recognition 6-bit codes can be added to lenses without 6-bit codes. Depending on the year of production, some lenses may have the 6-bit code added at the time of sale.

focal length(mm)90.9
Maximum aperture2
Minimum aperture16
Lens configuration5groups 5elements
Minimum distance(m)1.0
Lens length(mm)78Distance from mount flange
Lens max diameter(mm)64
Filter diameter(mm)55

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