Coronado 15 mm Blocking Filter
This Coronado 15 mm Blocking Filter is just as important for your safety and the system’s performance as the primary element. If you are switching to a longer focal length telescope your SolarMax system you can purchase blocking filters separately.
There is no advantage for visual use in using a larger blocking filter than required based on the focal length; however, based on customer feedback, we understand that for imaging with telescopes under 500mm fl, the BF10 is easier to use than the BF5. The Blocking Filter is not a stand-alone filter. It is an integral part of the Coronado design and cannot be used without a SolarMax series filter on the front of the optical system.