The Orion Dual-Speed Crayford Refractor Focuser is a specialized unit compatible with five distinct Orion refracting telescopes. It incorporates backlash-free movement and provides an 11-to-1 ...
Orion’s 2″ Low-Profile Dual-Speed Hybrid Reflector Focuser uses a special gear for more load capacity than a standard Crayford focuser. It has a dual-speed focuser with 11-to-1 reduction and works ...
Engineer and inventor John Wall, inventor of the Crayford Focuser Stargazing Live is back and as part of the Brian Cox-based excitement we're looking at one of the unsung heroes of amateur astronomy - ...
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