D76F700 Newton Reflector Objective Primary Mirror Astronomical Telescope

Key Benefits

• 76mm diameter collects sufficient light for planetary and lunar observation
• 700mm focal length provides a moderate focal ratio suitable for wide-field and medium-magnification views
• Spherical surface simplifies manufacturing and alignment for beginner and educational use
• Aluminum coating with protective foil resists oxidation and maintains optical performance
• 20mm secondary mirror minor axis allows for a compact secondary mirror assembly

Application Scenarios

• Amateur astronomy setup for observing the Moon, planets, and bright deep-sky objects
• Educational demonstration of Newtonian reflector optical principles in a classroom or workshop
• Replacement part for a DIY or kit-based Newtonian telescope with a 76mm aperture
• Component in a telescope assembly project for hobbyists building from optical parts
• Use in a portable telescope system where weight and size are balanced with optical performance

Who It Is For

• Amateur astronomers building or maintaining a Newtonian reflector telescope
• Educational institutions teaching optics and telescope mechanics
• Hobbyists assembling telescopes from component parts
• Science outreach programs demonstrating reflector design
• Telescope repair and upgrade specialists sourcing replacement mirrors

Problems It Solves

• A spherical primary mirror eliminates the need for complex figuring required in parabolic mirrors
• Aluminum coating with protective foil reduces the need for frequent re-coating or cleaning
• 76mm aperture offers a practical balance between light gathering and portability
• 700mm focal length avoids excessive tube length while supporting useful magnification
• 20mm secondary minor axis ensures compatibility with standard secondary mirror mounts

Technical Features

• Spherical primary mirror surface for Newtonian reflector design
• 76mm diameter with 700mm focal length for a 9.2 focal ratio
• Aluminum coating with protective foil layer to prevent degradation
• Surface accuracy of 1/6 wavefront error, suitable for visual observation
• Designed for use with a secondary mirror of 20mm minor axis

Specifications

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

Customization Options

• Available as a standalone primary mirror for integration into custom telescope designs
• Compatible with standard secondary mirror mounts using 20mm minor axis
• Can be supplied without protective foil for users who will apply their own coating

Comparison With Other Options

Use Guide

• Handle the mirror only by the edges to avoid coating contamination
• Do not remove the protective foil unless preparing for re-coating or integration
• Clean only with a soft brush or compressed air; avoid touching the surface
• Align the mirror in the telescope tube with the secondary mirror using a collimation tool
• Ensure the secondary mirror has a 20mm minor axis to match this primary mirror