bubble is approximately centered in the circular level (4). ( Fig.3.4 )
7)Tighten the centering screw.
8)Adjust the leveling foot screws (7) until the bubble is exactly centered in the
center circle ( Fig.3.5 ).
3.2 Focusing and sighting
1) Observe sighting device (2) and let objective (8) collimate the object
( Fig.3.6 ).
Fig.3.6 Fig.3.7