Coronado by Meade SolarMax II 90mm Solar Filter set with RichView tuning system. Includes 90mm diameter primary H-Alpha etalon filter with sub 0.7 angstrom bandwidth and 30mm Blocking Filter. Recommended for telescopes with a focal length of 3000mm or less to provide a fully illuminated image on the solar disc.
Coronado filters are used around the world by serious solar enthusiasts and professional research facilities alike. When properly and safely mounted on your high quality refractor or other suitable telescope this filter set allows observation and imaging of the amazing and ever changing surface detail and prominences on the Sun in hydrogen-alpha (Ha) light. Custom mounting will be required (adapters not included).
The patented RichView tuning assembly allows direct tuning of the primary filter etalon. No other commercially available Ha telescope can provide the tuning range and accuracy of the SolarMax II. Now you can tune for the highest contrast views of active regions, filaments and surface detail, or quickly and easily re-tune for prominences on the solar limb. The stunning bright red views through a Coronado Ha telescope display astounding surface and limb detail especially when the Sun is in an active phase.