Chroma H-beta filter 5nm - 2″ Mounted

H-beta 5nm filter from Chroma Technology

Visit 5nm H-beta filter from Chroma Technology is a narrow-band filter designed for astronomical imaging, specifically optimized to capture the H-beta line at 486.1 nm. This filter is particularly suited to astrophotographers wishing to obtain detailed images of nebulae and other objects rich in ionized hydrogen.

Key features

• Bandwidth : 5 nm, enabling precise isolation of the H-beta line while effectively blocking unwanted wavelengths.
• High transmission : Up to 95% at 486.1 nm, guaranteeing an excellent signal-to-noise ratio.
• Optical quality :
  • Surface polished to an accuracy of λ/4.
  • Multi-layer anti-reflective coatings to minimize halos and stray reflections.
• Available formats :
  • Assembled: 1.25" and 2".
  • Unmounted: Custom formats available.
• Substrate thickness : Approx. 3 mm, ensuring exceptional durability.

Applications

• Imaging specific nebulae :
  • Ideal for capturing objects such as the Horsehead Nebula, the California Nebula, or other structures rich in H-beta emission.
• Reducing light pollution :
  • Effectively blocks artificial light sources and sky background light.
• Advanced astrophotography :
  • Complement H-alpha and OIII filters to create false color or scientific palette images.
• Compatibility with high-speed systems :
  • Optimized for focal ratios up to f/4.0. A special version may be required for faster systems.

Technical highlights

• Exceptional durability :
  • Sputter coatings guarantee long-term spectral stability.
  • Resistant to temperature and humidity variations.
• Anti-halos design : Anti-reflective coatings eliminate halos around bright stars.
• Universal compatibility : Fits most filter wheels and drawers on the market.

Conclusion

The filter Chroma H-beta 5nm is an invaluable tool for astrophotographers seeking to capture the subtle details of nebulae rich in ionized hydrogen. Its optical precision, high transmission and ability to effectively reduce light pollution make it a quality choice for deep-sky imaging.