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In Stock Astrodon 49.7 Mm Dia. Unmounted 5 Nm H-a For 656.3 Nm Kit [DGUehTYW]

$72.99 $233.99 -69%

Astrodon H-a Narrowband Filter: Precision and PerformanceIntroducing the In Stock Astrodon 49.7 Mm Dia. Unmounted 5 Nm H-a For 656.3 Nm Kit [DGUehTYW] narrowband filter, a game-changer for astrophotography and research. This filter is designed to deliver unparalleled perfor

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Astrodon H-a Narrowband Filter: Precision and Performance

Introducing the In Stock Astrodon 49.7 Mm Dia. Unmounted 5 Nm H-a For 656.3 Nm Kit [DGUehTYW] narrowband filter, a game-changer for astrophotography and research. This filter is designed to deliver unparalleled performance and durability, setting a new standard in the industry. With its narrow 5 nm bandwidth, it enhances contrast by significantly reducing background signal, allowing for clearer and more detailed images of emission targets. The Astrodon narrowband filters are renowned for their high transmittance, guaranteeing >90% at the emission wavelength, which translates to the highest signal available in the market.

Advanced Specifications and Technical Details

Experience the excellence of Astrodon's engineering with this narrowband filter. It boasts a guaranteed >90% transmittance at the emission wavelength, ensuring optimal signal strength and contrast. The filter is meticulously coated to the edge and edge blackened to minimize stray light, making it ideal for long exposures of up to 30-45 minutes. What's more, Astrodon's latest technology has pushed the transmittance to >95-98%, further enhancing the filter's performance. This filter is also compatible with nearly all systems, including those with an f/3.5 aperture, without any loss in emission signal, eliminating the need for custom "upshifted" filters.

Applications and Benefits for Professional and Amateur Astronomers

Perfect for both professional astronomers and hobbyists, the Astrodon 5 nm H-a narrowband filter is a must-have for anyone looking to capture stunning images of celestial phenomena. Its superior contrast and signal strength make it ideal for imaging emission targets like nebulae, galaxies, and star clusters. The filter's ability to minimize halos around bright stars, even during long exposures, ensures that your images are crisp and detailed. With Astrodon, you can trust in the highest performance and guaranteed results, making it the top choice for astronomers seeking excellence in their astrophotography endeavors.

What Our Customers Say

January 2, 2026

Absolutely no complaints!

A very good product, I definitely and truly recommend.

- Rhisiart U..

January 2, 2026

Absolutely no complaints!

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- Tomos I..

January 2, 2026

Absolutely no complaints!

This is a really good and a very, very, very solid product.

- Merfyn S..

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