Astrozap
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Astrozap Focusing cap with built-in Bahtinov focusing mask for 8" Schmidt-Cassegrains and similar scopes
$109.00This Astrozap Bahtinov mask focusing cap fits most 8" Schmidt-Cassegrains, or any scope with an optical tube outer diameter between 216mm and 231mm . . . -
Astrozap Focusing cap with built-in Bahtinov focusing mask for 80mm refractors and similar scopes
$77.00This Astrozap Bahtinov mask focusing cap fits most 80mm refractors, such as the Astro-Tech AT80EDT, or any scope with an optical tube outer diameter between 101mm and 110mm . . . -
Astrozap Focusing cap with built-in Bahtinov focusing mask for Meade ETX-90 and similar scopes
$75.00This Astrozap Bahtinov mask focusing cap fits the Celestron C90 and Meade ETX90 Maksutov-Cassegrains, or any scope with an optical tube outer diameter between 90mm and 100mm . . .