Photometric filter Chroma Sloan r' - 2″ Mounted

Photometric Chroma Sloan r' filter

Visit Chroma Sloan r' photometric filter is designed to capture the red spectral band (approx. 550-700 nm) for photometric studies using the Sloan Digital Sky Survey (SDSS) system. Used in scientific astrophotography and astronomical research, this filter is ideal for measuring the brightness and physical properties of stars, galaxies and other celestial objects. Its advanced design guarantees optimum transmission, high contrast and perfect compatibility with modern CCD and CMOS sensors.

Key features

• Spectral transmission:
  • Centered on the red band (r'), with high transmission around 616.6 nm.
  • Effective blocking of UV and IR wavelengths to prevent light interference.
• Sustainable construction:
  • Multi-layer Reflex-Blocker™ coatings to minimize halos and stray reflections.
  • Blackened edges to eliminate internal reflections.
  • Standard 2 mm thickness, compatible with most filter wheels and optical systems.
• Compatibility:
  • Parfocal with other Sloan filters (u', g', i', z'), eliminating the need for refocusing.
  • Works perfectly with modern CCD and CMOS cameras, even on high-speed telescopes (f/1.8 to f/15).

Sloan filter technology and application

Photometric system filters Sloan Digital Sky Survey (SDSS) filters have been developed to provide precise spectral coverage in five distinct bands (u', g', r', i', z'). Unlike traditional UBVRI filters, Sloan filters use modern dielectric coatings that offer stable transmission, clean cut-off of out-of-band wavelengths and excellent durability.

The Sloan r' filter is particularly useful for studying evolved stars, such as red giants, and galaxies where red emission is predominant. It enables precise measurement of magnitude in this band and calculation of color indices. These data are essential for characterizing the physical properties of celestial objects, such as their temperature, chemical composition or distance.

Applications

• Scientific photometry (Sloan SDSS):
  • Precise measurement of brightness in the red band.
  • Study of evolved stars, red giants and galaxies with predominantly red emission.
• Advanced astrophotography:
  • Perfect complement to other Sloan filters (u', g', i', z') to produce scientifically calibrated data sets.
• Astronomical research:
  • Spectral analysis and physical characterization of celestial objects in the red band.

Conclusion

Visit Chroma Sloan r' photometric filter is an indispensable tool for amateur or professional astronomers wishing to carry out precise photometric studies in the red band of the spectrum. Its robust design, optimized optical performance and compatibility with modern sensors make it an essential choice for scientific imaging and advanced astronomical observation.