Moravian Instruments G2 Series Mark II User Manual page 36

Only after the proper tilt is reached, the pushing screws should be slightly
tightened to fix the adapter in the desired angle relative to camera head.
This ensures long-time stability of the adjusted adapter.
Adjustable telescope/lens adapters are attached slightly differently
depending if the adapter is attached directly to the camera head (e.g.
when camera is equipped with internal filter wheel) or to the External filter
wheel case.

G2 Mark II adapters are not mounted directly on the camera
head. Instead a tilting adapter base, holding the circular spring, is
always used.

If the External filter wheel is used, the adapted base is not
necessary, as the Mark II External filter wheel front plate is
already designed to hold the spring and it also contains threads to
fix respective adapters.
Figure 23: Mark II External filter wheels are already designed to for adjustable
telescope adapters
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