Orion Part #07722 - to fit 8" Newtonian and 8" SCT telescopes.
Inside diameter of 234.9mm
* A quality glass solar filter is essential to observe the sun safely with your telescope.
* Optical glass filter fits snugly over your telescope's aperture to block 99.999% of incoming sunlight
* Glass elements are machine-polished and triple-coated with nickel-chromium stainless steel
* Filter is mounted in an aluminum cell and supplied with foam tape liner and thumbscrews for secure fit
* Fits most 8" Newtonians from Orion, Bintel and Skywatcher plus 8" SCTs from Meade and Celestron