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 10 of 20 
Orion Telescopes
Coronado 30mm Solar Blocking Straight Filter
$2,299.99
 
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  • Hydrogen-alpha blocking filter for Coronado primary etalon filters
  • Secondary interference filter for full disc image of the Sun for telescopes up to 3,000mm focal length
  • Coronado's largest blocking filter, with 2" diameter nosepiece (NOTE: requires a 2" focuser)
  • MUST be used in conjunction with a front etalon filter - cannot be used alone
  • Includes a 1.25" diagonal and zero length 2" - 1.25" step down adapter, along with a foam lined case to protect your investment


Learn more
Item #  55746b
Mfg Model #  BF30

The Coronado BF30 is a 30mm straight-through type Hydrogen-alpha blocking filter with 2" nozzle. This blocking filter is the second element in any Coronado H-alpha system, and is just as crucial to your safety and the system's performance as the primary SolarMax etalon filter. Note this blocking filter CANNOT be used itself without a SolarMax etalon in front of the telescope front aperture. This secondary interference filter provides a full disc image of the Sun for telescopes up to 3,000mm focal length.

The BF30 is named because of the 30mm clear aperture window that passes the hydrogen-alpha light to the eyepiece or camera sensor. This 30mm window is wider than the window in the BF15, and thus provides a wider unvignetted field of view around the sun. This will allow wider apparent field of view eyepieces, higher magnification, and larger camera sensors to see an unvignetted view compared with the smaller blocking filters.

Note: The BF30 straight-through filter is designed for 2" focusers only. It will not work in a telescope with a 1.25" focuser. Because it is a straight through design, a standard 1.25" diagonal is included in order to convert this BF30 into a right angle design for visual use at a comfortable angle. A foam lined case is also included with cutouts for the filter, diagonal and a small number of optional eyepieces.

Designed and Manufactured in North America.

Warranty

This product is serviced and supported by its manufacturer according to the terms and conditions included in the packaged product. Orion's limited warranty does not apply. Please contact the manufacturer directly for technical support.

Warning

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

  • Additional included accessories
  • Other features
  • Warranty
    Five year

When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available.

SHIPPING RESTRICTIONS APPLY FOR THIS PRODUCT

This product is available to ship Standard delivery within the 50 US states. Delivery is not available to APO/DPO/FPO addresses, US territories/protectorates or Canada. 3 Day, 2nd Day and Next Day delivery is not available.

Returns

The Return Policy & Procedure for this product is different than Orion's standard return policy. Click here to learn more.

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