Bahtinov Focus Mask - ASA 10" Telescope Bundle 25" Aperture

25" Aperture

Small size and lighter weight permit use of lighter-duty tripods for easy field carrying and transportation

this optical tube pairs perfectly with a wide variety of mounts

The whole solar system literally revolves around him

This T-Ring attaches to Micro 4/3rds camera bodies and provides a standard M42 T-Ring connection

Bahtinov Focus Mask - ASA 10" Telescope Bundle 25" ApertureBahtinov focus masks provide an ingenious 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, Pavel Bahtinov. The mask works by creating a group of three diffraction spikes. Two of these generate a cross pattern, and the 3rd moves with your focus. You know you have achieved perfect focus when the 3rd diffraction spike is