Astronomik Filters UHC T2 (43701)

Using the Astronomik UHC filter will allow you to see more stars and finer details in deep-sky objects compared to filters from other manufacturers. This Ultra High Contrast (UHC) filter transmits nearly 100% of the radiation from O-III and H-beta spectral lines while effectively blocking scattered light and artificial pollution. Although the H-alpha band is not intended for visual use, it is highly beneficial when paired with electronic devices. By reducing the sky background, this filter reveals unexpected levels of detail in gas and planetary nebulae.

Exceptional Performance
The Astronomik UHC filter offers outstanding results even with small telescopes starting at 2" (50mm) aperture. Its high transmission ensures sufficient light for successful observations, while its design is optimized for telescope focal ratios between f/4 and f/15. Unlike other filters, it maintains pinpoint star images without chromatic distortion or transmission loss, except in extreme cases with focal ratios faster than f/2. The optical quality of the glass guarantees sharp, clear views comparable to observing without a filter.

Durability and Design
This filter features multi-layer coatings that are scratch-resistant, moisture-proof, and immune to aging effects. Its robust construction ensures long-lasting performance. Additionally, it is parfocal with other Astronomik filters, eliminating the need for refocusing when switching between filters.

Specifications:

• Passband: 480–505 nm & 645–700 nm
• Transmission: 97%
• Frame: T2 (M42 x 0.75) aluminium mount
• Coating: Multi-layered for durability

Applications
The Astronomik UHC filter is ideal for observing deep-sky objects under both dark skies and light-polluted conditions. It works exceptionally well with imaging devices, especially when combined with an additional IR-block filter.

With its superior performance, durability, and versatility, the Astronomik UHC filter is an essential tool for amateur and professional astronomers seeking enhanced contrast and detail in their observations and astrophotography.