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Custom-fit Tri-Bahtinov focus and collimation mask for the Meade 8" SCT
25-inch format used by most eyepieces
JMI MotoFocus+ William Optics Crayford Focusers - Config
and splitting double stars
JMI EV1-N Dual-Speed Event Horizon Telescope Focuser - Newtonian MotoFocus+ Custom-fit Tri-Bahtinov focus and collimationCNC Machined in the USA Event Horizon EV1 Dual Speed Crayford Focuser, Newtonian Base Our flagship manual focuser. A dual speed Crayford drive with a 10: 1 fine focus knob for the most precise adjustments possible by hand replaces the stock focuser on your Newtonian for true zero backlash, zero image shift focus. A masterpiece of engineering and workmanship, the EV1 is a low profile, friction drive Crayford focuser for the discriminating astronomer.
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