Astronomik Filters 2" CLS filter (16746)

Astronomik CLS Filter

The Astronomik CLS is an affordable filter designed for visual observation, black-and-white photography, and CCD imaging of nebulae, galaxies, and star clusters. It is compatible with astronomical instruments of any size. Since the end of 2008, Astronomik has introduced its improved "Halo-Free" filters for enhanced performance.

This filter blocks light from mercury and sodium-vapor lamps while allowing most visible light and H-alpha emissions to pass through. It ensures that all significant emission lines and the spectral regions visible to a well-dark-adapted eye can pass unobstructed.

Main Use
The Astronomik CLS filter is optimized for aperture ratios between 1:3 and 1:15. Unlike many other filters, it minimizes transmission losses and chromatic distortions unless used with extremely bright aperture ratios (1:2 or more). It is suitable for telescopes of all aperture sizes.

Specifications

• Capacity: Multiple coatings on the optical system
• Mount Material: Aluminium
• Frame: 2"
• General Features:
  • Series: CLS
  • Type: Broadband Filters
• Area of Application:
  • Visually useful: Yes
  • Useful for photographs: Yes
  • Anti-light-pollution: Yes