Farpoint Adjustable Tri-Bahtinov Mask — 9.5" to 12.5" OTAs Upgrade Kit If you already own a

If you already own a D-size (Losmandy-style) dovetail and want to move it to another scope

If your HD bar is currently on 5″ casters

and slides out cleanly when you're done

34″ – 42

Celestron CGE Pro 1400 HD*

Farpoint Adjustable Tri-Bahtinov Mask — 9.5" to 12.5" OTAs Upgrade Kit If you already own aNot sure this is the right mask for your telescope? Use our Focus Mask Finder match your scope to the right Standard, Tri Bahtinov, or Hyperstar RASA mask. Adjustable Tri Bahtinov focus and collimation mask for OTAs from 9. 5" to 12. 5" front aperture. Sets onto the front of your telescope, gives you focus AND a collimation check from a single short exposure, and lifts off cleanly when you're done. The adjustable peg system fits any scope in this