EMSea Bahtinov Mask Lightweight Acrylic Telescope Focusing Mask for Tube Outer Diameter from 60mm to 90mm for Reflector Refractor Dobsonians

• Made of premium acrylic, the telescope focusing the mask is strong and durable, reliable and long-term.
• The telescope fish bone plate is a suitable different telescope, such as a reflector, a refractor, for dobsonians. For Mak Cas, for SCT, you only need to measure the size of the telescope tube.
• The mask gently holds the telescope tube with three metal columns. These metal columns have a silicone cover with scratch resistance to protect the surface of the telescope. This can prevent slipping and make the mask completely in the middle.
• The scorched fish bone board overcomes the visual situation and can easily and easily provide a perfect focus for the telescope.
• The outer diameter of the mask supports the telescope mirror within the range of 60-90mm (there is an error of 1-2mm in manual measurement)

Description Item Descriptions: -Made of premium acrylic, the telescope focusing the mask is strong and durable, reliable and long-term. -The telescope fish bone plate is a suitable different telescope, such as a reflector, a refractor, for dobsonians. For Mak Cas, for SCT, you only need to measure the size of the telescope tube. -The mask gently holds the telescope tube with three metal columns. These metal columns have a silicone cover with scratch resistance to protect the surface of the telescope. This can prevent slipping and make the mask completely in the middle. -The scorched fish bone board overcomes the visual situation and can easily and easily provide a perfect focus for the telescope. -The outer diameter of the mask supports the telescope mirror within the range of 60-90mm (there is an error of 1-2mm in manual measurement) Package: 1 x Telescope Focusing Mask 3 x Installation Accessories Item Specifications: Item Type:Telescope Focusing Mask Material:Acrylic Color:As Shown Thickness:Approx. 2mm