Chroma's narrowband filters are crafted to target specific astronomical emission lines while maintaining high contrast and minimizing background noise. By precisely regulating the band position and blocking undesirable light, these filters facilitate the detailed imaging of nebulae and other emission-rich objects, even in light-polluted environments.
Narrowband Filter Sets
Chroma provides narrowband filter sets that are calibrated for reliable performance across typical emission lines. These sets come in various bandwidths to cater to different imaging conditions and system specifications. Each set includes H-alpha (Hα), Oxygen III (OIII), and Sulfur II (SII) filters.
SII Ha OIII: 3 nm
Ultra-narrow bandpass filters are designed to achieve the highest contrast and reduce background noise, making them ideal for capturing images in areas with significant light pollution or during bright moon phases.
SII Ha OIII: 5 nm
These balanced sets provide a distinct contrast while preserving enhanced signal transmission, appropriate for various imaging scenarios.
SII Ha OIII: 3 nm F/3
Ultra-narrow bandpass filter designed to provide the highest contrast and minimize background interference, and optimized for rapid optical systems (f/3).
LRGB + H-alpha Filter Sets
Chroma provides LRGB + H-alpha filter sets for broadband color imaging that enhance nebulae detail. These sets combine Chroma's standard LRGB filters with a specific narrowband H-alpha filter.
Users can obtain these sets with H-alpha filters available in 3 nm, 5 nm, or 8 nm bandwidths, enabling them to select the degree of contrast and background suppression most suitable for the imaging conditions.
Ha3LRGB
Standard LRGB filters combined with a 3 nm H-alpha filter achieve superior contrast and minimize background suppression in nebular imaging.
Ha5LRGB
Standard LRGB filters combined with a 5 nm H-alpha filter achieve a balance between high contrast and enhanced signal transmission.
HaLRGB
Conventional LRGB filters combined with an 8 nm H-alpha filter enhance throughput and adaptable imaging conditions.
Individual Narrowband Filters
For personalized setups or gradual enhancements, Chroma also offers specialized narrowband filters targeting frequently used astronomical emission lines.
H-alpha (Hα) Filters
Isolate the emission of hydrogen to uncover the detailed structure within nebulae and areas where stars are forming.
Oxygen III (O III) Filters
Acquire emissions from doubly ionized oxygen, emphasizing energetic areas and complementary structures through narrowband imaging.
Sulfur II (S II) Filters
Designed to separate sulfur emissions, these filters are frequently used in multi-channel narrowband processes.
Hydrogen-beta (H-beta) Filters
Separate hydrogen-beta emissions, which are frequently used to highlight specific features of nebulae and to augment H-alpha images.
Helium II (He-II) Filters
Extract helium emission lines, which are frequently utilized in particular or research-focused narrowband imaging techniques.
Nitrogen II (N II) Filters
Target nitrogen emissions frequently used in specialized or research-oriented narrowband imaging applications.
Need a Custom Narrowband Filter?
Chroma creates customized narrowband filters for observatories, research initiatives, or specialized imaging systems. These filters can be personalized to have unique center wavelengths, bandwidths, dimensions, or coating specifications that are not standard.
Built for Long-Term Imaging Projects
Astronomy filters must preserve their spectral precision despite fluctuations in temperature and humidity and prolonged use. Chroma’s hard-sputtered coatings are specifically designed for resilience and consistency, thereby providing reliable performance for extended imaging tasks and scientific research.
As an ISO-certified manufacturer, Chroma follows rigorous quality control protocols and reinforces this dedication with an industry-leading warranty, guaranteeing long-lasting stability and performance.
Explore Related Applications
Chroma filters are utilized in various scientific and industrial fields. Explore additional areas where the technology facilitates accuracy and dependability.
- Remote sensing
- SWIR applications
- UV applications
- SatCom
Narrowband Astronomy Filters. Source: Chroma Technology Corp.