80mm Caliber Spherical Concave Mirror with 800mm Focal Length This quality optical spherical concave mirror is designed for precision and reliability, ideal for DIY telescope projects and custom optical applications. Key Features: Caliber: 80mm for lightgathering capability Focal Length: 800mm for clear, sharp image formation Material: Spherical glass mirror with durable aluminum plating and protective film for enhanced reflectivity and protection Includes: Secondary mirror for your project needs Secondary Mirror Minor Axis: 20mm (short side diameter) Designed for compatibility with DIY telescope builds requiring D80F800mm optical components Benefits: Produces bright and clear images due to precision curvature and quality reflective coating Long focal length supports detailed viewing, making it suitable for astronomical and terrestrial observation Durable build ensures longterm performance in demanding environments Secondary mirror provided for complete setup convenience Applications: 1. Custombuilt telescopes for amateur astronomy enthusiasts seeking a quality primary mirror. 2. Optical experiments in educational settings where precise image formation is essential. 3. Replacement or upgrade part for existing telescope designs using an 80mm caliber, 800mm focal length spherical concave mirror. This mirror offers consistent optical performance, making it a dependable choice for those building or upgrading precision optical instruments.