PUSOKEI Bahtinov mask, Telescope Focusing Mask for a Tube Outer Diameter from 80-110mm, Acrylic Deep Space Photography Fishbone Focusing Board Focusing Mask

• Premium Material: Made of premium acrylic, the telescope focusing mask is sturdy and durable, reliable, and has a long service life.
• Suitable: The telescope fishbone plate is suitable different telescopes, such as reflector, refractor, for Dobsonians, for Mak Cas, for SCT, you just need to measure the size of telescope tubes.
• 3 Screw Sleeve: The 3 screw sleeve with anti skid silicone cover are used to fix the telescope, prevent slippage while keeping the tubes perfectly centered.
• Convenient: The focusing fishbone plate overcomes the visual condition, can fast and easily provide perfect focus for your telescopes.
• Lightweight: The acrylic telescope focusing mask is light in weight, will not damage the balance of telescope, and ensure it will be centered when installing.

Specification: Item Type: Telescope Focusing Mask Material: Acrylic Weight: Approx. 28g/0.99oz Color: As Shown Thickness: Approx. 2mm/0.08in Support Telescope Tubes with an Outer Diameter: Approx. 80-110mm/3.15-4.33in (Manual Measurement, 1-2mm Error May Exist) Package List: 1 x Telescope Focusing Mask 3 x Installation Accessories