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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27
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Description
DayStar Filters 130mm-Aperture Energy Rejection Filter (170mm Cap Diameter)For Use on Refractor and Maksutov OTAs Reduces Heat Load on Filter Assembly Absorbs or Reflects UV and or IR Light For H alpha, Sodium, Helium D3 Filters Inside Diameter of Cap: 17 cm (6. 692") Daystar Filters ' 130mm Aperture Energy Rejection Filter is designed for on axis use with Refractor and Maksutov style OTAs to reduce the heat load on your filter assembly by absorbing or reflecting UV and or IR light while transmitting light in the desired
- For Use on Refractor and Maksutov OTAs
- Reduces Heat Load on Filter Assembly
- Absorbs or Reflects UV and/or IR Light
- For H-alpha, Sodium, Helium D3 Filters
- Inside Diameter of Cap: 17 cm (6.692")
Daystar Filters ' 130mm-Aperture Energy Rejection Filter is designed for on-axis use with Refractor and Maksutov-style OTAs to reduce the heat load on your filter assembly by absorbing or reflecting UV and/or IR light while transmitting light in the desired spectrum. This ERF can be used with H-alpha, Sodium, and Helium D3 solar filters, but is incompatible with calcium wavelengths.
Choose the ERF aperture size to approximately match your refractor's objective aperture or Maksutov corrector plate. Select the correct filter cap size by measuring the outside diameter of the OTA's dew shield and choose the ERF with the smallest inside diameter that will fit over the dew shield. A set of screws is included to secure the ERF into place. This ERF's cap has an inside diameter of 17 cm (6.692").
- 3 x Set Screws
- Limited 10-Year Warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy