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D76F700 Newton Reflector Objective Primary Mirror Astronomical Telescope

D76F700 Newton Reflector Objective Primary Mirror Astronomical Telescope

D76F700 is a Newtonian reflector primary mirror for astronomical telescopes, featuring a 76 mm diameter spherical mirror with a 700 mm focal length. The mirror has an aluminum surface with protective foils and a secondary mirror with a minor axis of 20 mm. Surface accuracy is 1/6 wavelength, suitable for basic to intermediate telescope assembly and optical testing.

  • 76 mm diameter spherical primary mirror provides sufficient light gathering for planetary and lunar observation
  • 700 mm focal length offers a moderate focal ratio suitable for wide-field and detailed imaging
  • Aluminum surface with protective foils ensures long-term reflectivity and resistance to oxidation
  • Secondary mirror with 20 mm minor axis enables efficient light reflection in Newtonian configurations
  • Surface accuracy of 1/6 wavelength supports reliable optical performance in amateur and educational setups
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Technical features

  • Mirror type: Newtonian reflector spherical primary mirror
  • Diameter (D): 76 mm
  • Focal length (F): 700 mm
  • Surface: aluminum with protective foils
  • Secondary mirror minor axis: 20 mm
  • Surface accuracy: 1/6 wavelength
  • Spherical shape for simple fabrication and alignment
  • Designed for use in Newtonian telescope configurations

Who it is for

  • Amateur astronomers building or modifying Newtonian telescopes
  • Educational suppliers and science labs requiring optical components for teaching
  • Telescope kit manufacturers sourcing primary mirrors for assembly
  • Hobbyists and makers working on optical projects with precision mirror needs

Specifications

Mirror TypeNewtonian Reflector Spherical Primary
Diameter76 mm
Focal Length700 mm
Surface MaterialAluminum with Protective Foils
Secondary Mirror Minor Axis20 mm
Surface Accuracy1/6 wavelength

Use guide

  • Use only in Newtonian telescope designs with compatible secondary mirror and focuser
  • Ensure the secondary mirror minor axis is at least 20 mm to avoid vignetting
  • Handle with gloves to prevent fingerprints on the reflective surface
  • Store in a dry, dust-free environment with protective cover

FAQ

What is the mirror type and shape?
Spherical primary mirror for Newtonian reflector telescopes.
What is the focal length and diameter?
76 mm diameter, 700 mm focal length.
Is the surface coated? What material?
Yes, aluminum coating with protective foils for oxidation resistance.
What is the secondary mirror minor axis?
20 mm, designed for use with standard Newtonian secondary mirrors.
What is the surface accuracy?
1/6 wavelength, suitable for basic to intermediate optical performance.

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