Celestron Dielectric Star Diagonal 1.25" with Twist Lock for Refractor and Schmidt-Cassegrain Telescopes (93571)

The Celestron dielectric star diagonal with Twist-Lock is a 1.25-inch (3.18 cm) telescope accessory designed for astrophotography and astronomical observations. This diagonal redirects the telescope's light path at a precise 90-degree angle, allowing for comfortable viewing while maintaining optical integrity. The dielectric mirror features 58 special coatings that achieve reflectivity of over 99 percent, ensuring maximum light transmission to the eyepiece for brighter, sharper images with minimal light loss. The innovative Twist-Lock mechanism securely holds 1.25-inch eyepieces without traditional thumbscrews, preventing potential damage to the eyepiece housings and maintaining perfect optomechanical alignment. An integrated housing stop protects the mirror from damage caused by accessories with extended housings. Made from machined, black anodized aluminum with orange anodized Twist-Lock rings for improved visibility, the diagonal has a matte black, internally threaded design to prevent stray light and glare. This dielectric star diagonal offers diffraction-limited optical quality and ensures that nearly all collected light reaches the eyepiece without compromising optical performance. Its durable design and precise construction make it suitable for serious amateur astronomers seeking reliable performance in their telescope setups. The product has a diameter of 1.25 inches (3.18 cm) for compatibility with standard telescope systems and accessories.