Filters CLS Canon EOS XL Clip

Clip filter for Canon EOS full-frame cameras 5D MKII, 5D MKIII and 6D

The clip filter can be mounted without tools: as the name suggests, it simply clicks into place on the camera body. It can also be removed without tools. No modification to the body is required to use the clip filters.

Please note that the XL Clip Filters do not work with the Canon 5DS, 5DSR, 5D Mk IV and 6D MKII! The 5D MkI only works without LiveView.

The CLS filter increases the contrast between astronomical objects and the sky background.

Due to the large half-width, a correspondingly large amount of light is transmitted, so stars are only slightly attenuated. The CLS filter is designed to block as much stray light as possible while still allowing as much light as possible to pass through to the objects.

The useful range of application extends to visual observation with an aperture ratio of f/2 to f/15 for telescopes with an aperture of 2" (50 mm) or more and for photography with lenses and telescopes of all diameters.

A bit of help with your selection:

• As a first filter, we recommend the Astronomik CLS filter. This filter suppresses artificial light pollution and natural airglow. By using this filter you get a dark-sky background and can therefore use much longer exposure times to make fainter objects visible. The filter is optimised in such a way that objects are reproduced in their natural colours. Important: the simple CLS filter has no built-in IR-blocking. Therefore you will need the CLS-CCD filter for an astro-modified camera!
• A good choice for working in locations with really heavy light pollution is the Astronomik UHC filter. The transmission curve of this filter only allows the light of the H-beta, OIII, H-alpha and SII lines to pass through. The background suppression is significantly stronger than with the CLS, however this filter works only for gas nebulae! Star clusters and galaxies are largely filtered out.
• For a more in-depth introduction to astrophotography, we recommend the OIII, H-alpha and SII emission lines filters, available with full width at half maximum of 6nm or 12nm. With these filters you can create detailed images of faint objects even from locations with extreme light pollution and a full Moon high above in the sky. Images in these narrow emission lines are not naturally coloured.
• For the owners of astro-modified cameras we offer the Astronomik OWB filter: OWB stands for "original white balance". The filter corrects the displaced colour reproduction of a converted camera so that it can also be used for normal every-day photography, without having to revise every image on the computer.

Please note: In principle, all camera lenses can be used with the Clip-Filter - i.e. Canon EF lenses or camera lenses from other third party manufacturers such as Sigma, Tamron, Tokina, Walimex etc. However, the use of clip-filters with Canon EF-S lenses is NOT possible!