Farpoint Bahtinov Focus Mask — Celestron 11" RASA SCT CASE Pair a fitted case with

Pair a fitted case with a parallelogram mount and quick-release for the full kit

They thread into the bar's existing 1/2″ mount points

spreading the clamping load across the curve of the optical tube instead of pinching it at two points

Photo three shows the two styles of MotoFocus mounting brackets

that axis is out of collimation

Farpoint Bahtinov Focus Mask — Celestron 11" RASA SCT CASE Pair a fitted case withNot 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. Custom fit Bahtinov focus mask for the Celestron 11" Rowe Ackermann Schmidt Astrograph (RASA). Drops onto the front of your telescope, gives you perfect focus in seconds, and lifts off cleanly when you're done. Made in our own shop in the USA American materials, American machinery, by Americans.