Farpoint Bahtinov Maske für RASA 11 New

Bahtinov Mask for Celestron 11″ RASA- is an ingenious new way to easily focus a telescope. Pavel Bahtinov, a Russian amateur telescope maker and astronomer, created this simple, very intuitive method and the device has universally been named after him: The Bahtinov Mask.

Bahtinov focus mask

The focus mask is used to facilitate accurate focusing when doing astrophotography.