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Originally Posted by ballaratdragons
The ED80 Crayford focuser comes off very easy. 3 screws!
I wasn't aware of 10:1 focusers for ED's, only dob Crayfords. Interesting. The only focuser customising on my ED80 is the ED100 Crayford for a lot longer focuser travel.  |
Fine focusers with a reduction element (planetary reducer on one knob for example) have been around for a long time. Fullerscopes, Broadhurst & Clarkeson in the UK were fitting them to their refractor, Cassegrain and Newtonian focusers back in the 1960s as I remember drooling over one in 1969 while visiting their shop in London.
Skip forward a while and looksee what you can get for your existing Synta refractor:
http://www.finefocuser.com/ff2.html
Cheers,
Ian