Astronomik UHC Filter

The clip-in design sits directly inside the camera body, between the lens and the sensor. Because it is positioned behind the lens, it works with any lens you attach to your Canon EOS APS-C camera, including wide-angle lenses that cannot accept standard screw-on filters.

No, this specific filter is designed exclusively for Canon EOS cameras with APS-C sensors. It will not fit or function correctly with full-frame Canon bodies.

The UHC filter is designed to suppress the emission lines of common artificial light sources, such as mercury and sodium-vapor street lamps. By blocking these specific wavelengths, it increases the contrast of deep-sky objects like nebulae while allowing the light from those objects to pass through.

This filter is optimized for astrophotography and will significantly alter the color balance of your images if used during the day. It is intended for capturing celestial objects at night and is not recommended for general daylight photography.

Yes, it is best to remove the filter when you are not performing astrophotography. Since it is a specialized high-contrast filter, it will negatively affect the color accuracy and light transmission of standard terrestrial or night-sky landscape shots.