SVBONY Bahtinov Mask Focusing Mask Aluminum Alloy Telescope Focusing Mask 170 To 240mm Caliber Fixed Diameter 175 To 220mm

Product details

• Hard aluminum alloy; SVBONY Bahtinov Mask is made of aluminum alloy; not plastic; And it has whole anodizing aluminium process.
• SVBONY Bahtinov Mask's effect; Perfect focusing for your CCD DSLR or Webcam in seconds; The great focus for your telescope quickly and easily.
• Suitable for telescopes front end diameter 175mm to 220mm; Universal adaptation; 3 bolts with plastic cover allow the mask to be simply attached to any telescope.
• Ultra thin; SVBONY Bahtinov Mask is Light weight so you wont upset the balance on your scope.
• With 3 fixing screws;Masks now feature 3 holes which can be attached with 3 screws to prevent the mask from falling all the way to the ground;They have non-scratching silicon sleeves to protect you valued telescope surface.