directly to the main worm, no slipping!

how to mount:

Attention: We are coupling our MFOC motor directly to the main worm, not to the microfocus shaft.
Unfortunately Starlight Instruments has some variations the Feathertouch focuser series,
so when ordering we need to ask you to measure the  dimensions depicted in the photo below L1, L2, L3, D1, D2.

The standard 3,5" version will fit these values:
D1-- 37,2mm
D2-- 13.1mm
L1--  bigger than12mm
L2-  6.5mm