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Crayford Focuser


Spile
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what a gent John Wall was. Nice little video- thanks Spile. Not sure Starlight Instruments would agree with his comments about rack and pinion focusers though- they don’t all have slop ;)

Mark

Edited by markse68
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I'm guilty of thinking the crayford was the older type and being replaced bit by bit with 'better' R & P.  But 'presumably' the newer R & P are a cross between the good bits of a crayford type (to reduce slop) and the benefits of a decent R & P to reduce slippage and improve accuracy.

 

 

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