Feature

●Wide applications: works with all types of telescopes, mirrors, refractors, for Dobsons, for Mak Cas and for SCT, all you need to do is measure the size of your telescopic tube and choose the suitable mask size.
●Offer the best focus: the mask eliminates the guesswork of focusing and even overcomes visual conditions to give your telescope the best focus quickly and easily.
●3 metal posts: the mask holds the telescopic tube gently and firmly with three metal posts. These metal posts come with scratch resistant silicone covers to protect the surface of your telescope. This prevents slipping while keeping the mask perfectly centred.
●3-post installation and lightweight design: thanks to this 3-post holder, the mask stays centered while it fits a wider range of telescopes. The Bahtinov Telescope Focus Mask is lightweight so you dont disturb the balance of the scope.
●APPLICATION: The outer diameter of the Bahtinov focus mask supports the telescope lens in the range of 100-140mm.


Description

Specification:
Item Type:Telescopic Focus Mask
Material: Acrylic
Thickness: approx. 2mm
Color:As picture show
Approximate weight: 38 g / 1.3 ounces.
The outer diameter size range of the telescopic lens is supported: approx. 100-140 mm / 3.9-5.5 inches.

Package list:
1 x Bahtinov mask, 3 x mounting accessories.