D305F1200 305mm Telescope Main Mirror Parabolic Primary Mirror Large Diameter

Key Benefits

• 305mm diameter provides a large light-gathering aperture for deep-sky and planetary observation
• 1200mm focal length enables long focal ratios ideal for high-magnification planetary and lunar imaging
• 1/6 PV surface accuracy ensures minimal wavefront error and sharp, high-contrast images
• Aluminum coating with silica protective film maintains reflectivity and resists oxidation over time
• Edge thickness of 28-30mm provides structural rigidity for large mirrors under thermal and mechanical stress

Application Scenarios

• Building a custom Newtonian reflector telescope for amateur astronomy with high-resolution planetary imaging
• Replacing a damaged or outdated primary mirror in a large aperture telescope system
• Integrating into a telescope design requiring a 305mm parabolic mirror with precise focal length
• Using in a research-grade or educational telescope setup where surface accuracy is critical
• Supporting long-exposure astrophotography with minimal spherical aberration due to parabolic shape

Who It Is For

• Amateur astronomers building or upgrading Newtonian reflector telescopes
• Educational institutions developing large-aperture telescope projects for physics or astronomy labs
• Research labs requiring large, high-precision mirrors for optical testing or prototype systems
• Telescope manufacturers sourcing component-level mirrors for assembly
• DIY telescope builders needing a ready-to-install primary mirror with known specifications

Problems It Solves

• A mirror with poor surface accuracy causes blurred or distorted images, especially at high magnification
• Lack of protective coating leads to rapid degradation of reflectivity in humid or outdoor environments
• Insufficient edge thickness in large mirrors increases risk of cracking or deformation during handling
• Mismatched focal length or diameter prevents proper alignment in a Newtonian optical train
• Need to source a mirror with known PV tolerance to avoid optical errors in imaging or measurement

Technical Features

• Parabolic shape designed for Newtonian reflector systems to eliminate spherical aberration
• Focal length of 1200mm provides a long focal ratio suitable for high-magnification observation
• Surface accuracy of 1/6 PV ensures minimal wavefront error across the mirror surface
• Aluminum reflective coating with silica overlayer enhances reflectivity and environmental durability
• Edge thickness between 28mm and 30mm supports structural integrity under thermal and mechanical load

Specifications

Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.

Customization Options

• Mirror can be supplied without coating for customer coating application
• Edge thickness can be adjusted within 28-30mm range based on mounting requirements
• Optional mounting flange or cell design available upon request for integration
• Custom packaging for shipping or storage can be arranged

Comparison With Other Options

Use Guide

• Handle the mirror only by the edges to avoid fingerprints on the optical surface
• Clean the surface only with a soft brush or compressed air; avoid solvents or wiping
• Mount the mirror in a cell with proper support to prevent stress-induced deformation
• Ensure the focal length matches the telescope's optical train design before assembly
• Store the mirror in a dry, temperature-stable environment to prevent coating degradation