60-90mm (there is an error of 1-2mm in manual measurement) Package List: 1 x Bahtinov Mask 3 x Mounting Accessories These metal posts come with scratch silicone covers to your telescope This prevents slippage while keeping the mask perfectly centered. You have to do a manual focus using a bahtinov mask on a bright star to get your telescope's individual focus value. Then, autofocus will... Specification: Item Type: Telescope Focus Mask Material: Acrylic Thickness: Approx. 2mm / 0.08in Color: As Pictures Shown Weight: Approx. 46g / 1.6oz The Outer Diameter Size Range of the Telescope Objective Lens Is Supported: Approx. Post Installation and Lightweight Design: Thanks to this 3 post mount, the mask remains centered while fitting a wider range of telescopes. 2mm Telescope Focusing Bahtinov Mask Acrylic Focus Mask Vbestlife Bahtinov Ask, Telescope Focusing Bahtinov Ask Acrylic Focus Astrophotography Telescope Applicable Size: The outer diameter of the bahtinov mask supports the telescope objective lens in the range of 100‑140mm (there is a 1‑2mm error in manual measurement). TEAM ASSOCIATED RIVAL MT10 V2 RTR TRUCK BRUSHLESS Wide Range of Applications: Bahtinov Focus Mask Works with all types of telescopes, mirrors, refractors, for Dobsonians, for Mak Cas and for , all you need to do is measure your telescope tube size and choose the appropriate mask size.
