Telescope-Accessories-Chroma Technology H-Alpha 8 nm Filter, 2″ Mounted

Unmatched Excellence: The Chroma Technology H-Alpha 8 nm Filter!

Ready to take your deep space astrophotography game to the next level? The Chroma 8 nm H-Alpha filter will help you do just this! As hydrogen-alpha filters are arguably the most important narrowband filter to have within your astronomy toolkit, having one of this caliber will help you capture outstanding images brimming with clarity. By cutting through all other wavelengths, even the murk of light pollution and the glow of the Moon are blocked out. What’s left is detail-rich hydrogen alpha data. This stark separation of Ha wavelengths from the background sky makes your images pop with sharp nebulous structure!

Understanding the ins and outs of filter development, Chroma Technology has crafted this filter with premium glass and prestigious coatings to ensure maximum performance. The sputtered hard coatings on both surfaces ensure an absence of ghosting and maximum light transmission to your camera sensor, and are extremely durable against high temperatures and humidity. These coatings coupled with the narrow bandwidth of 8 nm provide impressive contrast within your captured frames. Fine details within the Orion Nebula, the California Nebula, the Horsehead Nebula, and countless more are easily resolved thanks to the precision craftsmanship from Chroma Technology. As a mounted 2” filter, incorporating this accessory into your imaging train is a breeze!

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Why Choose Chroma?

• Chroma Technology, a 100% employee owned company founded in 1991, is an industry leader in development of precision-crafted optical filters. Their in-depth knowledge on filter construction and dedication to cutting-edge coating technology delivers unparalleled transmittance rates in the desired wavelength, something well apparent through the outstanding clarity and sharpness within the captured images! This highly reputable company stands out with their unrivaled expertise, developing filters that not only deliver performance beyond compare for amateur astronomy, but are designed with such dexterity that makes them well suited for terrestrial astronomy research applications. With both ISO 9001 and B Corporation certifications, Chroma Technology demonstrates their commitment to excellence—ensuring their filters not only meet, but exceed customer expectations.

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A Professional Grade Astrophotography Filter of the Highest Quality

Let’s Check out the Stats!

What exactly makes one filter better than another? How can I tell which filter will be best for my needs? To understand how well a filter performs, manufacturers provide what is called a transmission chart along with their filters. These charts give insight into the wavelengths allowed through, the bandpass, as well as the transmission percentage. It may be a bit confusing at first glance, but no need to worry, we have you covered! Our team of gear experts have crafted a comprehensive How to Read a Filter Transmission Chart guide to help you better understand the capabilities of any filters you may be interested in. With this article, you’ll be readily equipped with the knowledge needed to make a well informed, data-driven decision based on your specific needs.

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Narrow 8 nm H-alpha Bandpass
Hydrogen alpha, one of the most abundant emissions in the universe, features a wavelength of 656 nm. As the primary component within the majority of emission nebulae, isolating the 656 nm wavelength is crucial in discerning structural detail within these celestial objects. This Chroma Technology H-Alpha filter features an outstanding transmittance of 96.05% at 656 nm, allowing copious amounts of Ha detail through to your sensor. Not only this, but the narrow bandwidth of 8 nm provides exceptional contrast between the Ha wavelength and any other wavelengths present. This means it’s possible to image in the midst of light pollution and gibbous Moon phases thanks to this filter’s light blocking abilities. Combine the captured data with data from an OIII filter and SII filter to create a stunning SHO image, or overlay RGB color data to make your true-color images pop!

Extensive Compatibility
Compatible with most filter wheels and filter drawers, seamlessly join this Chroma 8 nm Ha filter to almost any set up! A wide variety of user-supplied filter holders, such as the ZWO 7 Position Electronic Filter Wheel, ZWO Gen 2 M42 x 0.75 Filter Drawer, and the QHY CFW3 Large Color Filter Wheel are great choices to house this Chroma filter within. The 2” size is wonderful for use full frame cameras, providing sharp detail to the edges of the frame. The male threads on this mounted filter feature a height of 1.75 mm, while the filter cell height excluding these threads is 5.25 mm. The total filter height is 7 mm.

Premier Craftsmanship
Ensuring performance for years to come, Chroma has crafted this H-alpha filter with premium hard coatings. These coatings are applied using a technique called reactive magnetron sputtering, and offer superb resilience to humidity changes and extreme temperate fluctuations. Not only this, but these hard coating help preserve spectral accuracy in the central wavelength (CWL). Both sides of this filter are fully coated, with anti-reflective coatings found on the rear surface to prevent image distortions and image ghosting. Chroma astronomy filters utilize 3.0 mm thick single substrates of the highest quality glass. This use of a single substrate eliminates the need for lamination, in-turn improving the filter’s overall performance and durability.