Commands of the SAN GIORGIO type C Collimator
Almost all the controls are on the right side except
-the brightness adjustment knob located underneath
the lever to insert the dark filter found on the left side.
A+B constitute a backup viewfinder in the event of an electrical failure. The whole thing can be rotated 180° downwards when not in use.
C causes vertical displacement of the reflected grating (inclination of the crystal).
D causes horizontal displacement of the reflected grating (rotation of the upper part of the collimator). E is its position index.
F is the lever that allows you to choose the luminous reticle.
G is the brightness adjustment knob.