Astronomik UHC Filter

The Astronomik UHC filter is highly versatile. It works well with telescopes of all aperture ratios under dark skies, and is recommended for telescopes with at least a 4-inch (100mm) aperture when observing from urban environments with light pollution.

It significantly boosts contrast by allowing nearly 100% transmission of critical OIII and H-beta light lines while simultaneously blocking artificial light pollution and scattered light. This makes gaseous and planetary nebulae stand out much more clearly against the background sky.

Yes, this filter is parfocal with other Astronomik filters. This means you can swap filters during an observation session without needing to significantly refocus your telescope, keeping your workflow seamless.

While primarily designed for deep-sky objects like nebulae, this filter is also surprisingly effective for observing Jupiter's cloud structures and helping to separate double stars, making it a useful addition to your eyepiece kit.

Not at all. The filter is diffraction-limited and crafted from finely polished optical glass, ensuring it maintains the high optical performance of your telescope without introducing distortion.

The filter features an extremely scratch-resistant and durable coating. It is designed to withstand regular handling and cleaning, and it comes with a protective storage box to keep it safe when not in use.