SVBONY SV223 90° ClickLock Dielectric Mirror Diagonal - 2"

>99% Reflectivity from a 11.5mm Thick Dielectric Mirror

At the core of the SV223 is a dielectric-coated mirror engineered for maximum light throughput. With a measured reflectivity of over 99%, it transmits nearly all collected light to your eyepiece, resulting in brighter views of faint deep-sky objects and higher contrast on planetary surfaces. The 11.5mm thick mirror provides a rigid, stable optical surface that resists flexure and maintains flatness for sharp, detailed images.

• Dielectric Coatings: Unlike standard aluminum or silver coatings that can degrade over time, dielectric layers are highly durable and maintain their >99% reflectivity for years of use.
• High-Contrast Baffling: The interior of the diagonal is machined with anti-reflection baffling to absorb stray light, ensuring a dark background sky and improving contrast during lunar and planetary observation.
• 43mm Clear Aperture: The large clear aperture prevents the light cone from being clipped, fully illuminating the field stop of even the widest 2-inch eyepieces.

The SV223 Clicklock System: Secure, Centered Clamping

The Clicklock mechanism replaces traditional thumbscrews with a fast, secure, and self-centering clamping system. A simple twist of the knurled ring locks or unlocks your eyepiece, applying even pressure around the barrel for a solid connection that eliminates wobble and protects your accessories from scratches.

This system is especially useful for imagers and visual observers who frequently change eyepieces or cameras. The brass compression ring ensures a firm grip without marring the eyepiece barrel, preserving the value and condition of your equipment. An internal safety stop also prevents long eyepiece barrels from making contact with the mirror surface.

M48 Threads and 1.25-inch Adapter for Full System Integration

The Svbony SV223 is designed for broad compatibility with modern telescope systems. The 2-inch nosepiece features standard M48x0.75 filter threads, allowing you to attach nebula, light pollution, or color filters directly to the diagonal for system-wide filtration.

For observers with a mixed collection of eyepieces, the included 2-inch to 1.25-inch adapter provides seamless integration. This heavy-duty adapter also uses a non-marring brass compression ring, extending the same protection to your 1.25-inch accessories. The 90° viewing angle provides a comfortable observing position, reducing neck strain when viewing objects high in the sky.

Svbony SV223 vs. Baader Clicklock: A Comparative Look

The Baader Planetarium 2" ClickLock diagonal is the established benchmark for this type of accessory, known for its exceptional German-made optical and mechanical precision. The Svbony SV223 adopts the same core concepts—a dielectric mirror and a twist-lock clamping mechanism—to offer a similar user experience at a more accessible price point.

• Competitor Advantage (Baader): Baader diagonals typically specify a higher optical surface flatness (e.g., 1/10λ) and are manufactured to extremely tight tolerances, which can provide a slight edge in image sharpness at very high magnifications.
• This Product's Advantage (Svbony SV223): The SV223 provides the key functional benefits of a Clicklock system and a >99% reflective dielectric mirror, making it a significant upgrade over standard diagonals. For most visual applications, it delivers comparable brightness and convenience for a fraction of the cost of the premium alternative.