Products

GSO Filters

Burgess Optical is now importing, distributing, and selling GSO filters. These filters are Hoya filters and are available in 14 different colors. They are glass and mono-coated (single anti-reflective coating). The filters fit standard 1-1/4" threads. Each filter is threaded to accept another filter or other threaded 1-1/4" accessory. Fully screwed into an eyepiece or diagonal, each filter protrudes an additional 5/16" (7.7mm) beyond the end of the barrel.

Each filter comes in a plastic case. Each case is 1-3/4" x 2-5/32" x 11/16" (43mm x 54mm x 18mm) and comes with a friction fit clear cover.

Each color is useful for bringing out planetary detail. See http://sciastro.net/portia/advice/filters.htm for a good description of filters and what each color is best suited for. The following list identifies each of the filters by Wratten number and color.

The Filters are available individually or as a set of all 14.

Price and Availabilty Information

Purchase Information