TELESCOPE Crayford Focusers: A History And Demonstration (How It Works) ( by

The Crayford Focuser is everywhere in astronomy. Few people know that it was invented by a modest engineer who gave it away for free...
#crayford #telescope #focuser #reflactorguy

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Questions Answered:
1) Who invented the #Crayford #focuser
2) Who was John Wall?
3) How do I take apart and fix a Crayford focuser?


#astrophotography
#astronomy
#dobsonian
#reflector
#reflactor
#dobsonian
‪@AstronomyGarage‬