USED GEAR INFORMATION
This mask is in good condition. Will fit telescopes with an outer diameter ranging from 8.5" to 12" (Typically the aperture of these telescopes are in the 8-11" range). Made of black powder coated aluminum.
Description
In 2008, Pavel Bahtinov, a Russian amateur telescope maker and astronomer, published an ingenious new way to easily focus your DSLR camera, webcam or CCD camera for astrophotography. The method is simple, very intuitive, and the device has universally been named after the inventor: The Bahtinov Mask.

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