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Compact Altair 120mm Hydrogen Alpha D-erf Solar Filter Set [ZlrMWRz0]

$67.99 $217.99 -69%

Altair 120mm Hydrogen Alpha D-ERF Solar Filter The Altair 120mm Hydrogen Alpha D-ERF Solar Filter is a specialized tool designed for astronomers and solar imaging enthusiasts. This filter offers unparalleled protection for your telescope and solar im

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Altair 120mm Hydrogen Alpha D-ERF Solar Filter

The Altair 120mm Hydrogen Alpha D-ERF Solar Filter is a specialized tool designed for astronomers and solar imaging enthusiasts. This filter offers unparalleled protection for your telescope and solar imaging equipment, ensuring that your observations remain clear and undistorted by excessive heat build-up. It is an essential accessory for those using Daystar Hydrogen Alpha Quark or similar filters, as it complements their capabilities while providing additional heat protection.

Key Features:

  • Bandpass Filter: The D-ERF filter provides a 40nm FHWM bandpass at the H-alpha wavelength of 656.28 nm, delivering only the desired Hydrogen Alpha wavelengths for optimal solar imaging.
  • Heat Reduction: This filter significantly reduces heat build-up by blocking infrared and ultraviolet light, as well as most of the unwanted emission spectrum of the sun, ensuring a clearer image and protecting your equipment from damage.
  • Optical Quality: The filter features multilayer coatings with a SiO2 protective overcoat, ensuring a high level of optical quality and durability.

Benefits of Using the Altair D-ERF Filter

The Altair 120mm Hydrogen Alpha D-ERF Solar Filter offers numerous benefits for both amateur and professional astronomers:

  • Enhanced Image Quality: By reducing heat build-up, the filter prevents image distortion and haze, resulting in a sharper and more detailed view of the sun.
  • Prolonged Equipment Life: The filter's heat-blocking capabilities protect your telescope and solar imaging equipment from potential damage, extending the lifespan of your investment.
  • Improved Observation Experience: With the D-ERF filter, you can enjoy longer observation sessions without worrying about temperature drift or equipment overheating.

What Our Customers Say

January 1, 2026

Absolutely no complaints!

I'm very happy with this product.

- Carrie Q..

January 1, 2026

Absolutely no complaints!

This is a nice, solid item.

- Deana F..

January 1, 2026

Absolutely no complaints!

I'm very happy with the tool.

- Renee T..

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