Bahtinov Mask for Camera Lens Size:72mm Camera Lens Bahtinov Mask A “Speed Rate Regulator” knob

A “Speed Rate Regulator” knob is located just under the power indicator

Features Coma free

The PowerTank Lithium LT is built with lithium nickel cobalt manganese technology

Two interchangeable adapters allow you to switch between a Schmidt-Cassegrain thread adapter and a 2” barrel adapter so you can use this diagonal with a wide variety of telescopes

Bahtinov Mask for Camera Lens Size:72mm Camera Lens Bahtinov Mask A “Speed Rate Regulator” knobThe Farpoint Camera Filter Bahtinov Focus Mask is an ingenious new way to easily focus your DSLR camera, Mirrorless, webcam or CCD camera for astrophotography. 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. This Bahtinov Focus Mask snaps in to your camera lenses that have the specified size filter thread. The Bahtinov