1. [UNIVERSAL COMPATIBILITY] Suitable for telescope types, including reflector, refractor, Dobson and Cassegrain telescopes
2. [PRECISE] Eliminates guesswork, overcomes visual limitations and quickly gets the best focus
3. [SECURE CLAMPING] Prevents slipping, maintains centering and ensures compatibility with a wide range of telescopes
4. [DIFFRACTION PATTERN] Artificial diffraction gratings for precise focus alignment using light
5. [LIGHTWEIGHT AND STRONG] Made of sturdy aluminum alloy, lightweight for balance and easy carrying
Specification:
Item Type: Focus Mask
Material: Aluminum Alloy
Suitable telescopes. Internal diameter: approx. 103 mm/4.06 inches.
Comment to use:
Plug and Play
Package List:
Package includes 1 x Focus Mask