William Optics 99% Dielectric Dura Bright Diagonal - 1.25"

The William Optics 99% Dielectric Dura Bright Diagonal is a premium 1.25" star diagonal designed to enhance visual observing with refractor and catadioptric telescopes. Its high-quality construction and advanced coatings ensure maximum light transmission and image quality.

Designed for use with 1.25" eyepieces and telescopes with 1.25" focusers. Not compatible with 2" equipment without additional adapters.

Optical Performance

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Features a 99% reflectivity dielectric coating on the mirror, ensuring maximum light transmission for brighter, higher-contrast views. This coating also provides excellent durability and resistance to degradation over time.

Construction

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Built with high-quality materials for durability and stability. The robust housing ensures precise alignment of the optical components, critical for delivering sharp, distortion-free images.

Compatibility:

Designed for use with 1.25" eyepieces and telescopes with 1.25" focusers. The diagonal features standard 1.25" fittings on both the eyepiece and telescope sides, ensuring wide compatibility with most refractors and catadioptric telescopes.

Comfort and Ergonomics

The 90-degree design provides a comfortable viewing position, especially for astronomical observations near the zenith. This ergonomic design reduces neck strain during extended observing sessions.

Image Orientation

As a 90-degree star diagonal, it provides a correct left-right image orientation but inverts the image top-to-bottom. This configuration is ideal for astronomical observations where image orientation is less critical.

Versatility

Suitable for a wide range of astronomical observations, from planetary and lunar viewing to deep-sky objects. The high reflectivity ensures that even faint objects are visible with maximum clarity.

Dura Bright Coating

The Dura Bright coating not only enhances reflectivity but also provides excellent protection against scratches and environmental factors. This ensures the diagonal maintains its optical performance over years of use.

Precision Machining

Features precision-machined components to ensure a secure and precise fit with both eyepieces and telescope focusers. This attention to detail minimizes any potential for image shift or wobble during use.