Astronomik Filters CLS Clip Nikon Z XL (71078)

The Astronomik CLS is an affordable filter designed for black-and-white photography, CCD imaging, and visual observation of nebulae, galaxies, and star clusters. It is compatible with astronomical instruments of any size. Since 2008, the filters have been redesigned to be "halo-free," eliminating unwanted reflections and improving overall performance.

Light Pollution Reduction
This filter effectively blocks light from mercury and sodium-vapor lamps while allowing most visible light and H-alpha emissions to pass. It preserves important emission lines and the spectral range visible to dark-adapted eyes, making it ideal for reducing light pollution in astrophotography.

Optimized Performance
The Astronomik CLS filter is optimized for aperture ratios between 1:3 and 1:15. Transmission losses and chromatic distortions are minimal unless used with extremely bright aperture ratios (e.g., 1:2 or higher). It is suitable for telescopes of all aperture sizes.

Applications

• Photography: Excellent for DSLR cameras (modified or unmodified), CCD cameras, and black-and-white film photography.
• Visual Observation: While not ideal for urban skies, it works well in dark-sky conditions to reduce light pollution from artificial sources.

Technical Specifications

• 92% transmission at 486nm (H-beta)
• 92% transmission at 496nm (OIII)
• 92% transmission at 501nm (OIII)
• 97% transmission at 656nm (H-alpha)
• Passes light from 450–540nm and beyond 650nm.
• Glass thickness: 1mm with multiple coatings for durability.

Build Quality and Compatibility
The filter features an aluminium mount in a clip-filter frame format, making it suitable for Nikon cameras. It is resistant to scratches, humidity, and aging effects. The filter is also parfocal with other Astronomik filters, ensuring no reduction in optical performance.

Astronomik CLS filters come in a durable plastic storage box for long-term protection and are available in various sizes to suit different needs.