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Coronado BF10,10mm 1-1/4" H-Alpha Secondary Blocking Filter for Solar Viewing.

Please note: This item is currently back-ordered by the manufacturer. Although we have no estimated time of arrival for this item, you can order it now and it will ship as soon as it arrives. Your card will only be charged once item is shipped.
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About the Coronado BF10

• The Blocking Filter is the second element in any Coronado H-Alpha system, it is just as crucial to your safety and the system's performance as the front element. Use the following guidelines for selecting which Blocking Filter you need based on the focal length of the telescope being used. 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.

Focal Length <500mm - BF5.
Focal Length <1000mm - BF10.

Coronado BF10 Includes

  • Please NOTE: The Blocking Filter CANNOT be used without a SM Front Cell

Coronado BF10 Features

  • The Blocking Filter is Not a Stand Alone Filter. It is an Integral Part of the Coronado Design and Can Not be Used Without a SolarMax Series Filter on the Front of the Optical System.

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