Home » Blog » Coronado SolarMax II 60 Double Stack RichView Tuning Telescope with H-Alpha Etalon Filters 1 Internal/1 External, 60mm Aperture, 10mm Blocking Filter » Coronado SolarMax II 60 Double Stack RichView Tuning Telescope with H-Alpha Etalon Filters 1 Internal/1 External, 60mm Aperture, 10mm Blocking Filter