Farpoint Bahtinov Focus Mask — Celestron 11" SCT Hyperstar (Scratch & Dent)Scratch and Dent Discount! Minor cosmetic flaws do not affect performance. Farpoint Focus Mask Celestron 11 SCT (Hyperstar Fastar) fits Fastar Hyperstar READY C11 SCT's. It does NOT fit with the Hyperstar or Fastar camera installed. But if you look carefully, you will see a slit that goes almost all the way across one side. Just complete that slit and you can flex (twist) the mask to open it up to get around the camera. Farpoint Bahtinov Mask