Bahtinov focus mask for Celestron 9.25" SCT with Fastar or Hyperstar READY, FP415H Farpoint Focus Mask - Celestron 9.25 SCT (Hyperstar/Fastar) fits Fastar/Hyperstar READY C9.25 SCT's. It does NOT fit with the Hyperstar or Fastar camera installed. That will require a different mask, coming soon. Bahtinov Focus Masks make focusing for astrophotography easy; instructions included Newer model Celestron 9.25" SCT's are "Fastar ready" and need this "H" model Simply place the Bahtinov Focus Mask over the end of your telescope Made in the USA by Farpoint Astro