Astronomik UHC Filter

This filter is designed specifically for Canon EOS full-frame DSLR bodies. It is a clip-in style filter, so it fits directly into the camera body, making it incompatible with APS-C sensor models.

The parfocal design means the filter is engineered to maintain focus across different wavelengths. You can swap this filter in or out without needing to refocus your telescope, which saves significant time during long imaging sessions.

Yes, this filter is optimized for telescopes ranging from f/10 down to f/3.5. It will perform well with your f/4 setup, providing the contrast enhancement you need for deep-sky objects.

While it significantly suppresses the unwanted wavelengths associated with city light pollution, no filter can remove 100% of it. It works by isolating critical emission lines like H-beta, OIII, and H-Alpha, which helps your deep-sky targets stand out against the background glow.

The filter features a specialized moisture and scratch-resistant coating designed to withstand the rigors of field use. It is built to maintain consistent performance even when exposed to the elements over time.

The filter comes with a dedicated storage box to keep it protected and clean when not in use. It is also backed by a 10-year warranty for added peace of mind.