The Astronomik CLS CCD is suitable under light-polluted skies for DSLR Cameras, which have been remodeled for astronomical use. The filter enhances the contrast between all deep-sky objects and the background.
The Astronomik CLS-CCD Filter enhances the contrast between astronomical objects and the background. Due to the wider transmission curve compared to UHC filters, a greater amount of light will pass the filter. Stars will be less dimmed. This filter has been optimized to block as much spurious light as possible and simultaneously provide the best performance for ‘useful’ light. A good filter for DSLR-, CCD- and film b/w-photography as well as observation of deep-sky-objects with telescopes or photo lenses of all aperture f/3 and above.
Main use of a CLS CCD filter
The filter completely blocks emission lines of artificial light sources like streetlights (e.g. sodium- and mercury-vapor) as well as generic airglow. All ‘important’ emission lines as well as the spectral range of the night-adapted eye pass through. The supplementary IR-blocking layer allows the use for DSLR and Webcams without an integrated IR-block filter.
- Easier resolution of Double Stars.
- With the EOS-Clip model, photography with DSLR cameras is feasible even under extremely light-polluted conditions without shifting the white balance.
- The 1.25″ and 2″ socket models can be used for observations from light-polluted areas.
CLS (non-CCD): For cameras with an integrated IR-filter or for visual observation.