For more than 35 years the company Thousand Oaks Optical in Arizona has been manufacturing high-quality solar filters and can count NASA, the Discovery Channel, CBS, National Geographic, as well as many of the leading universities and observatories worldwide among its customers.

Alongside filters for solar observing, the Thousand Oaks product range also includes various top-quality nebula filters (the LP series) as well as some heater bands to prevent the build-up of dew on optical surfaces.