36mm ring mount for Photometric Filters
Unlike other Astrodon filters, the Photometric filters (Johnson-Cousins and Sloan) [...]
Video of Astrodon Luminance filter blocking IR light from TV remote
Here is something you can try at home: Any cellphone [...]
Most Astrodon Filters in stock!
I just (July 31, 2018) finished updating the inventory numbers [...]
Should I get Astrodon E-Series or I-Series LRGB filters?
Astrodon LRGB Gen2 I-Series Tru-Balance Filter Sets A [...]
Lumicon Gen3 OIII Filter Scan Report
Pretty nice! OIII Gen3 Data Sheet
2″ Lumicon Econoline OIII Filter Now $50
We have halved the price of the Lumicon 2 inch [...]
What is the difference between Astrodon 1.25″ filters and Astrodon 31mm filters?
This is a common source of confusion. So...here we go. [...]
Orion Ultrablock vs Lumicon UHC transmission curves
Lumicon UHC comes out on top. We periodically test samples [...]