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William Optics 1.25" 90º Erecting Prism for RedCat or WhiteCat 51

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I sold my Redcat setup and no longer need these visual assistants that are paired to the scope. This one is a William Optics 90 degree diagonal that has a BAK4 image erecting prism with anti-reflection coating. This threads right into the focuser, so no need to worry about shifting even with larger eyepieces.

Asking $80 shipped CONUS, paypal fees included.