Mamiya 7 User Manual page 8

Nomenclature and Functional Parts
Aperture scale
Focusing ring
Used to focus the lens.
Depth-of-field scale
Allows the aperture (f-stop) to
be checked in relation to the
correct focusing range.
Lens alignment dot
When mounting or changing a
lens, align this dot with the dot
on the camera body.
6
Aperture ring
Distance scale (m-ft)
Used to set or read the subject-to-lens
distance.
Infrared index mark
When engaged in infrared photography,
use this mark to align lens according to
usual focusing position.
Rangefinder coupling lever