Astronomik Filters UHC-E XL Clip Canon EOS R (64939)

The Astronomik UHC (Ultra High Contrast) filter is specifically designed to enhance visual astronomy by providing nearly 100% transmission of O-III and H-beta radiation. This allows observers to see more stars and intricate details in deep-sky objects, such as gas and planetary nebulae, compared to other filters. It also effectively blocks scattered light and artificial light pollution, delivering a darker sky background and revealing unexpected levels of detail.

Key Features and Applications

• High Light Transmission: The filter ensures excellent visibility of deep-sky objects, even with small telescopes starting at 2" (50mm) aperture.
• Optimized Design: Suitable for telescopes with focal ratios between f/4 and f/15, ensuring minimal chromatic distortions or transmission losses. Issues only arise with extremely bright aperture ratios of f/2 or less.
• Versatility: While primarily intended for visual use, the filter also supports imaging applications when paired with electronic devices.
• Durable Build: Made from high-quality optical glass, the filter maintains needle-sharp star images and is resistant to scratches, moisture, and aging.

Specifications

• Passband: 465–530 nm & >645 nm.
• Filter Thickness: 1 mm.
• Coating: Multi-layer coatings for durability.
• Compatibility: Works with Canon EOS cameras and telescopes of various sizes.

The Astronomik UHC filter is an essential tool for both amateur and professional astronomers seeking to improve their observations under various sky conditions. Its ability to block unwanted wavelengths while enhancing critical emission lines makes it a top choice for deep-sky exploration.