Used Celestron Oxygen III Narrowband Filter - 2" Hydrogen Alpha Comets - Enhances the definition

Comets - Enhances the definition of comet dust tails in 10" and larger scopes

Designed specifically for the Vespera lens

thereby increasing or decreasing the friction between the optical tube and the sideboards

Orion SkyWatcher 10"

Whether you’re new to the hobby or a seasoned amateur astronomer

Used Celestron Oxygen III Narrowband Filter - 2" Hydrogen Alpha Comets - Enhances the definitionThis is a 2" Celestron O III filter in excellent, clean condition. Comes in its original jewel box. The 2" OIII narrowband filter isolates the two doubly ionized oxygen lines (496 and 501 nm lines) Filter has ultra hard, vacuum deposited coating Eliminates un natural colored halos surrounding bright stars The 2" OIII narrowband filter isolates just the two doubly ionized oxygen lines (496 and 501 nm lines) emitted by planetary and emission nebulae,