Friday, October 9, 2020

Low Profile Focuser

This is what I have so far.  It is a tight fit of the tube in the base.  The thumbscrew is perhaps not strictly needed, but it makes less likely to fall out.  I have ordered a 1 25" helical focuser that goes into the tube.  The tube you see provides coarse adjustment.   The helical focuser provides very fine focus.  I can also use this in the 5" refractor and the 8" reflector,  both of which have only coarse focusers.  Big Bertha has a dual speed focuser, very nice for the perfect focus.

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