Package Include
1 x Focusing Mask

Features
-Product Info:Metal fish
- Color: Black.
- Size: 9.50X9.50X0.10cm/3.73X3.73X0.04in
- Material: Aluminum alloy.
- Suitable for use on all types of telescope, reflectors, refractors bahtinov mask focusing mask.
- Focusing masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task. The best focus for your telescope quickly and easily aluminum bahtinov mask.
- Adopts precision production to the stable characteristics and high mask.
- Focusing masks produce a distinct, intersecting pattern once accurate focus is achieved telescope focusing mask.
- The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect your valued telescope surface. This prevents slippage, whilst allowing the mask to remain perfectly central. bahtinov focus mask
bahtinov aluminum mask

Goods Description
bahtinov mask for telescope Because of this 3-post mounting, the mask remains , whilst fitting a wider range of telescopes.aluminum bahtinov mask These focusing masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to telescope