Astronomik Filters OIII 6nm CCD Clip Canon EOS R XL (67061)

The OIII-CCD filter is designed for imaging OIII nebulae, making it suitable for both light-polluted observation sites and dark-sky environments. It significantly enhances contrast by isolating objects glowing at 501nm from the background, allowing faint structures to stand out prominently. With a narrow bandwidth of 6nm and a high transmission rate of 96%, the filter blocks all unwanted light from UV to IR, creating an extremely dark background. This makes it ideal for imaging faint objects in dense star fields or under heavy light pollution. Optimized for CCD and CMOS sensors with very low dark current, the filter ensures exceptional imaging performance.

The filter features perfect blocking of unwanted light, is parfocal with all Astronomik filters, and is resistant to moisture, scratches, and aging. Its optically polished substrate is striae-free and free of residual stresses, ensuring high-quality results. Thanks to MRF coating technology, it can be used on devices with apertures as fast as f/4. When combined with H-alpha-CCD and SII-CCD filters, it enables the creation of false-color emission line images (HSO), similar to those produced by the Hubble Space Telescope, even in heavily light-polluted locations.

For alternative setups, the 12nm line filters are better suited for DSLRs or CCD cameras with higher dark current. These filters also work well with cameras that have built-in guiding chips, as they allow for capturing twice as many stars compared to the 6nm filter.

Specifications

• Capacity:
  • Central wavelength (nm): 501
  • Half-value width (nm): 6
  • Frame: Clip-Filters
  • Transmission: 96%
  • Mount material: Aluminium
• Coating of Optical System: MRF
• Appropriate for: Canon EOS
• General Features:
  • Type: Filters
  • Type of build: Line filter
  • Series: OIII 6nm
• Area of Application:
  • Useful for photographs: Yes
  • Visually useful: No
  • Twin stars: No
  • Moon & Planets: No
  • Nebulae & galaxies: Yes