Scicalife Bahtinov Focusing Aluminum Alloy Focusing 60mm Bahtinov Focusing Mask for Telescopes Dew Shield Diameter Sky Watcher Refractors Black

Compatible with any type of telescope, and especially useful for astrophotography setups, These focusing masks are adjustable to fit a wide range of optical tubes, unlike which are only able to telescope, Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length, Because of this 3- post mounting, the remains , whilst fitting a wider range of telescopes, Fine workmanship and creative appearance ensure its popularity and practicality