203mm Parabolic Primary Mirror with a focal length of 800mm, devised for optimal light gathering and clarity in astronomical observations. Includes a 60mm secondary mirror, coated with aluminum film for enhanced durability and protection against scratches, ensuring long-lasting performance. Features a center mark on the primary mirror for easy optical calibration, making it perfect for both beginners and experienced DIY telescope builders. Ideal for creating your own Newtonian reflector telescope, this mirror set provides all the essential components for a successful DIY astronomy project. Select from the primary mirror, secondary mirror, or complete accessory kits based on your specific needs to enhance your stargazing experience.