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Coronado BF-5 Blocking Filter

B&H # COBF5 Mfr # BF5
Usually ships in 7-14 business days

Availability Details

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This is a special order item and is non-cancelable and non-returnable. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment.

International Orders*
For international orders, credit cards will be charged at time you place your order.

Free Standard Shipping
Not eligible for free Expedited Shipping
You Pay: $329.00
Product Highlights
  • 1.25" 90° Diagonal
  • For Telescopes ≤500mm
  • Needs a SolarMax Solar Viewing Filter
  • Made in the USA

The BF-5 Blocking Filter from Coronado is the secondary interference filter in a Coronado H-Alpha solar viewing system. Blocking filters are not stand-alone devices; they must be used in conjunction with a SolarMax filter. In a solar viewing system, the blocking filter is just as crucial to the viewer's safety and the system's performance as the front element. This 5mm blocking filter, the BF-5, is compatible with telescopes that have a focal length that is equal to or less than 500mm.

Note! SolarMax filters are sold in kits that include a blocking filter. This blocking filter offered here is intended for viewers who have two different focal length telescopes that they intend to use with their SolarMax system.

Must be used with a SolarMax filter
1.25" right angle diagonal, image size: 4.6 mm
For telescopes with a focal length equal to or less than 500 mm
Coronado BF-5 Blocking Filter
  • Limited 5 Year Warranty
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