The Farpoint 1.25 inch LRGbB Filter Sets are positioned within a thin metal ring with a full 26mm clear aperture that threads into the barrel of any standard 1.25" eyepiece or filter wheel that can accept 1.25" filters. They help to increase contrast and reduce glare and light scattering. Each filter is threaded at both ends to accept another filter if required.
Filters come inside individual plastic cases with a transparent window. Five filters are supplied. A bright L type filter to aid with focusing, one Red, one Green and two Blue filters.