Maintenance Report

Lens mount base design for OLYMPUS film SLR cameras!



at first

I’m sorry

Because we can’t speak english

I am using DeepL translate, so it may be a strange sentence,

but I would like you to understand

Thank you

In this issue, we will look at the lens mount base design of a manual focus film SLR camera released in 1973 by OLYMPUS.

OLYMPUS OM-1 (Reference product)

The lens mount for this body is an OM mount.
The mount base is designed with an elliptical or gently curved design that descends at a gentle angle from the underside of the eye-level finder to the outer diameter of the lens mount, and then again at an angle back to the extended direction of the initial starting point.

The lens mount consists of a black-colored body side and a silver lens mount side. The shutter speed dial is sandwiched between the silver mount base and the lens mount. The shutter speed dial is built into the The black-colored base has a knob for manual mirror up.

The lens mount is secured with three screws. The black-colored base on this side has a flash terminal.

This time we introduced a lens mount base for an OLYMPUS manual focus SLR camera released in 1973.

In the 1970s, the lens mount bases of SLR cameras were mostly made of large curved lines or ovals, and the OM-1 introduced here is also in line with the trend of the time.

I think it is a very good idea to have the shutter speed dial integrated into the lens mount.


Please look forward to my future columns on the lens mount base design of film SLR cameras and other features of interest!

Thank you again for reading this column.

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Writer Takashi Okumura