Because your astronomical pursuits demand nothing but the highest quality in optical performance, the C9-1/4-A Optical Tube Assembly is engineered to exceed expectations. This sophisticated 9 1/4" optical tube features the innovative StarBright XLT high transmission optical system design, a hallmark of Celestron's commitment to advanced telescope technology. The StarBright XLT coating is a testament to Celestron's dedication to providing amateur astronomers with professional-grade equipment. It comprises three integral components that work in harmony to deliver unparalleled viewing experiences: 1. Unique enhanced multi-layer mirror coatings that maximize reflectivity, ensuring brighter images by directing more light to the eyepiece. 2. Multi-layer anti-reflective coatings on the corrector lens that reduce light loss and enhance contrast, allowing for crisper, more detailed observations of celestial wonders. 3. High Transmission Water White glass with exceptional optical clarity minimizes chromatic aberration and produces sharp, true-to-life visuals. Together, these elements of the StarBright XLT coatings culminate in one of the most refined optical systems available, setting a new standard for clarity and brightness in the field of amateur astronomy. The durable C9-1/4-A Optical Tube Assembly is designed to fit seamlessly onto a CGE mount via its sturdy dovetail slide bar, ensuring a secure and stable platform for your stargazing adventures. Whether you're observing the delicate rings of Saturn, the stormy atmosphere of Jupiter, or distant nebulae, this high-quality Schmidt-Cassegrain optical tube with its generous 9.25 -inch aperture and 1.25 -inch eyepiece diameter will bring the cosmos right to your backyard. Choose the C9-1/4-A Optical Tube Assembly for its exceptional optical prowess and Celestron's reputable craftsmanship, and elevate your astronomical observation to new heights.