Chroma B-Bessell photometric filter - 2″ Mounted

Chroma B-Bessell Photometric Filter

Visit Chroma B-Bessell photometric filter is designed to capture the blue spectral band (approx. 400-500 nm) for precise photometric studies. It is part of the UBVRI photometric system, widely used in scientific astronomy to measure the brightness and colors of celestial objects. This filter offers optimized transmission and exceptional optical quality, guaranteeing reliable results compatible with historical databases.

Key features

• Spectral transmission:
  • Focused on the blue band (B), with an effective cut-off at UV and IR wavelengths to avoid interference.
• Sustainable construction:
  • Multi-layer anti-reflective coatings to minimize halos and stray reflections.
  • Parfocal with Chroma's other UBVRI filters, facilitating their use in filter wheels.
  • Standard 2 mm thickness, compatible with most optical systems.
• Compatibility:
  • Works perfectly with modern CCD and CMOS cameras, even on high-speed telescopes (f/1.8 to f/15).

Bessell filter technology and application

Bessell filters have become a standard in astronomical photometry thanks to their ability to faithfully reproduce the characteristics of Johnson-Cousins filters while adapting to modern sensors. These filters use advanced dielectric coatings to guarantee stable transmission and exceptional durability.

The filter B-Bessell is essential for capturing blue light, particularly useful for studying young, hot or massive stars. In scientific astrophotography, it enables precise measurement of magnitude in the blue band and calculation of color indices such as g'-r'. These data are crucial for characterizing the physical properties of stars, such as their temperature or chemical composition.

Applications

• Scientific photometry (UBVRI):
  • Precise measurement of brightness in the blue band.
  • Study of variable stars, supernovae, star clusters and galaxies.
• Advanced astrophotography:
  • The perfect complement to other UBVRI filters for producing scientifically calibrated data sets.
• Astronomical research:
  • Spectral analysis and study of the physical properties of celestial objects.

Conclusion

Visit Chroma B-Bessell photometric filter is an indispensable tool for amateur or professional astronomers wishing to carry out precise photometric studies in the blue band of the visible spectrum. Its robust design, optimized transmission and rigorous calibration make it an essential choice for scientific imaging and advanced astronomical observation.