Farpoint Bahtinov Focus Mask — Celestron 8" RASA

Great company

This is a must have product to keep your RASA in focus. I re focus using this mask when ever I move to a new target, change filters and when the temperature changes more than 10 degrees Fahrenheit. Easy to use and makes sharp images easier. Fits around my ASIZWO 2600MC camera and with a rotation, will clear your cables without unplugging them.