- Hydrogen-alpha blocking filter for Coronado primary etalon filters
- Secondary interference filter for full disc image of the Sun for telescopes up to 1,500mm focal length
- Long 2″ diameter nosepiece with 1.25″ eyepiece holder and t-thread
- 15mm clear aperture provides a wider unvignetted field of view compared with the smaller BF10 filter
- MUST be used in conjunction with a front etalon filter – cannot be used alone
Details
The Coronado BF15 15mm right angle (diagonal) type Hydrogen-alpha blocking filter, now in the SolarMax III design! This updated design includes a long 2″ diameter nosepiece with 1.25″ eyepiece holder and t-thread connection. The 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 by 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 1,500mm focal length. Can also be used with 1.25″ focusers by purchasing the Coronado 1.25″ adapter #624018.
The BF15 is named because of the 15mm clear aperture window that passes the hydrogen-alpha light to the eyepiece or camera sensor. This 15mm window is wider than the window in the BF10, 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 BF10 version.
Designed and Manufactured in North America.
Fast Shipping and Professional Packaging
Due to our longstanding partnership with UPS FedEx DHL as well as other major international carriers, we are able to provide various shipping options. Our warehouse personnel will pack each item according to our strict requirements. Before they are shipped, your goods will be thoroughly examined and secured. Everyday, we send to thousands of clients in different countries. This is a sign of our determination to become the largest online retailer globally. The warehouses and centers for distribution are in Europe, as well as the USA.
Note that orders containing more than one item will be processed according to the specific item.
Before shipping before shipping, we'll inspect thoroughly the items you've purchased. Most orders are delivered within 48 hours. The estimated delivery time is between 3 and 7 days.
Returns
The inventory is always changing and we do not fully manage it because of the fact that many parties are involved, including our warehouse and factory. Therefore, the actual inventory could change at any time. It's possible that your order will be unable to fill when you have placed the order.
Our policy is valid for 30 days. If 30 days have gone without a trace since the purchase and we are unable to offer an exchange or refund.
In order for your item to be returned it must be in its original packaging, unopened and in the same condition as when you received it in. It must also be in its original packaging.
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