Astronomik Filters OIII 6nm CCD 50x50mm unmounted (63224)

The OIII-CCD filter is an excellent choice for imaging OIII nebulae, whether observing from light-polluted urban areas or pristine dark-sky sites. It significantly enhances the contrast between objects emitting at 501nm and the background, making faint structures stand out vividly. With a narrow bandwidth of 6nm and a high transmission rate of 96%, this filter blocks all unwanted light from UV to IR, resulting in an exceptionally dark background. It is particularly well-suited for use with CCD and CMOS sensors that have very low dark current, ensuring optimal imaging performance.

This filter provides perfect blocking of unwanted light and is parfocal with all Astronomik filters. It is resistant to moisture, scratches, and aging, with an optically polished substrate that is striae-free and free of residual stresses. 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 environments.

For alternative applications, the 12nm line filters are ideal for DSLRs or CCD cameras with higher dark current. These filters are also advantageous for cameras with built-in guiding chips, as they typically capture twice as many stars in an image compared to the 6nm filter.

Specifications

• Capacity:
  • Central wavelength (nm): 501
  • Half-value width (nm): 6
  • Transmission: 96%
  • Mount material: Aluminium
  • Frame: unmounted
• Coating of Optical System: MRF
• Filter Size (mm): 50 x 50
• General Features:
  • Series: OIII 6nm
  • Type: Filters
  • Type of build: Line filter
• Area of Application:
  • Useful for photographs: Yes
  • Galaxies and star clusters: Yes
  • Anti light-pollution: Yes
  • Visually useful: No