Sky-Watcher 90° 2" Star Diagonal

The Sky-Watcher 90° 2" Star Diagonal is a high-performance accessory specifically engineered to complement and enhance the performance of premium telescope systems. At the heart of its design is an ergonomic 90° viewing angle, which provides a comfortable observation position and significantly reduces physical strain during extended sessions under the stars. By maximizing light transmission and minimizing optical aberrations, this diagonal delivers exceptional image quality with improved contrast, revealing the finer details of distant celestial objects with unparalleled clarity.

Constructed from high-quality materials to ensure long-lasting durability and reliability, this diagonal is built to perform in a variety of observing conditions. It offers great versatility through the inclusion of a 2″ to 1.25″ eyepiece adaptor, making it compatible with a wide range of both large-format and standard eyepieces. Whether you are conducting a professional survey or enjoying a relaxed night of stargazing, the advanced engineering of this star diagonal ensures a steady, precise, and immersive viewing experience that highlights the true beauty of the night sky.

Product Features in Detail

Ergonomic Design for Deep Observation

The 90° angle is essential for astronomical viewing. It redirects the light path so you can look comfortably down into the eyepiece, preventing the neck and back strain that occurs when trying to view objects high in the sky through a straight-through setup.

Maximized Light Throughput

Engineered for performance, this diagonal ensures that the light gathered by your objective lens reaches your eye with minimal loss. This results in brighter images, making it easier to spot faint deep-sky targets like distant nebulae and star clusters.

Versatile Eyepiece Integration

The included 2″ to 1.25″ adaptor offers the best of both worlds. You can utilize massive 2″ wide-field eyepieces for panoramic views of the Milky Way, then quickly switch to high-power 1.25″ eyepieces for detailed planetary study.

Optimized for Premium Optics

High-end telescopes require high-end accessories. This diagonal is designed to match the resolution of premium refractors and Schmidt-Cassegrains, ensuring that the crispness and color correction of your telescope are preserved all the way to the eyepiece.

Steady and Vibration-Free Support

Built for stability, the robust construction ensures that your eyepieces are held securely in place. This rigidity is crucial for maintaining a sharp focus and preventing image shift when using heavier, high-end accessories.

Built for Longevity

Sky-Watcher uses durable materials to ensure this diagonal remains a staple of your kit for years. The reliable mechanical design and quality finish mean it can handle the moisture and temperature changes typical of a night in the field.