It is hard (and somewhat dangerous for me, the scope is accessible with help of ladders) to place-replace B-mask in the dark during photo session to check focus..
Idea to do something about it came from
here.
I decided to use
this motor, with additional worm gear reduction, initial design is attached.. I have some plastic gears and worms in my boxes, and bracket will be 3D-printed.
Long time ago I used Delphi4 for some projects involving GUI (
focus).. maybe I will use it again (or similar freeware.. any suggestions? Lazarus maybe?) for B-mask control (I will need to use
2 relays from Relay box discussed
here.