Bahtinov Mask Size::85-120mm The ability to combine filters

The ability to combine filters opens up many exciting possibilities

allowing you to change eyepieces without removing and re-attaching the filter from each eyepiece barrel

whilst maintaining colours to a natural level

Built-in Polar Alignment Scope Holder

and still having a larger aperture

Bahtinov Mask Size::85-120mm The ability to combine filtersBahtinov Mask Whether youre doing planetary visual observing, planetary imaging, or deep sky imaging, the Bahtinov Mask is a great accessory to get the best focus for your telescope quickly and easily. Credit goes to Russian amateur astronomer Pavel Bahtinov for making his idea available to the astronomy community. Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope. They have an