Maintenance Report

Lens mount base design for MINOLTA 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 present the lens mount base design of MINOLTA’s 1991 film SLR camera with autofocus.

MINOLTA α3xi (Reference product)

The lens mount for this body is an A-mount.
The mount base is designed to descend diagonally from the same line as the eye-level finder to the outer diameter of the lens mount, and from there, slightly diagonally back to the extended direction of the initial starting point, with the underside almost straight.

The lens mount base is constructed as an integral part of the camera body.

The lens mount is secured with six screws. On the side of the base is an aperture setting lever, a lens swap button, and a focus mode switch.

In this issue, we introduced the lens mount base of Minolta’s 1991 release SLR camera with autofocus.

In the 1990s, most of the film SLR camera bodies from various manufacturers incorporated the autofocus function while the body material changed from steel to plastic.

The body design of the α3xi was almost entirely composed of curved surfaces, and the lens mount base was also a part of this trend.


I will continue to write columns on the design and features of film SLR cameras that interest me, so please look forward to them!

Thank you again for reading this column.

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Writer Takashi Okumura