Use the Alpine Astronomical Baader Double Polarizing Filter to eliminate extraneous light and improve contrast during lunar and planetary observations. It is made with standard 1.25 threads to fit on just about any eyepiece. The filter's double...
Use the Alpine Astronomical Baader Double Polarizing Filter to eliminate extraneous light and improve contrast during lunar and planetary observations. It is made with standard 1.25 threads to fit on just about any eyepiece. The filter's double...