Telescope Focus Mask, 120 to 160mm Provide The Best Focus Acrylic Anti Slip Bahtinov Mask for Reflector

Description

1. Wide Applications: 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.2. Good Functions: The mask takes the guesswork out of focusing and even overcomes conditions to give your telescope the best focus quickly and easily.3. Metal Posts: The mask grips the telescope tube gently and firmly with three metal posts. These metal posts come with scratch resistant silicone covers to your telescope . This prevents slippage while keeping the mask perfectly centered.4. Post Installation and Lightweight Design: Thanks to this 3 post mount, the mask remains centered while fitting a wider range of telescopes. The bahtinov focus mask for telescopes is lightweight so you won't upset the balance of the scope.5. Applicable Size: The outer diameter of the bahtinov mask supports the telescope objective lens in the range of 120 to 160mm (there is a 1?2mm error in manual measurement).Specification:Item Type: Telescope Focus MaskMaterial: AcrylicThickness: Approx. 2mm / 0.08inColor: As Pictures ShownWeight: Approx. 46g / 1.6ozThe Outer Diameter Size Range of the Telescope Objective Lens Is Supported: Approx. 120-160mm / 4.7-6.3in (there is an error of 1-2mm in manual measurement)packing list:1 x Bahtinov Mask3 x Mounting Accessories