Astronomik CLS deepsky fitler (EOS-clip)

These filters for Canon EOS APS-C models provide many advantages. Astrophotography is possible with these filters not only using the telescope, but using standard objective lenses as well. On the other hand these narrowband filters can be used with off-axis guiders as well, as the guide star's brightness is not affected by the filter.

The Astronomik CLS blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter.

Note: these filters are compatible with all Canon objective lenses except for the EF-S series, where the back lens does not fit into the camera body because of the filter.

Compatible models: 350D, 400D, 450D, 500D, 550D, 600D, 1000D, 20D, 30D, 40D, 50D, 60D, 7D

The CLS filters are general purpose deepsky filters which blocks the light from Hg and Na lamps, but transmits all the other wavelengths.

They work as a contrast enhance filter for emission, planetary nebulae and supernova remnants. They're also work for all other objects with wider spectrum as well, like stellar clusters, galaxies, open- and globular clusters if our sky is light polluted.