Newtonian reflector telescope secondary mirror (elliptical) for DIY telescope

NYJLGD ★ 3.6/5 · ItemOracle Score Mid-Range

$50 USD
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Newtonian Reflector Telescope DIY Dedicated Secondary Mirror Elliptical for DIY Newtonian Reflecting Astronomical Telescope

Elliptical secondary mirror for Newtonian reflectors with aluminized surface and scratch-protective film. Dimension tolerance 0.5mm; surface accuracy PV 1/4-1/6. Useful for optical axis alignment in DIY setups

Highlights

  • aluminized reflective surface
  • protective film against scratches
  • Newtonian optical axis compatibility

Pros

  • aluminized reflective surface
  • protective film to reduce scratches
  • dimension tolerance 0.5mm
  • suitable for Newtonian optical axis alignment
  • explicitly designed for DIY telescope projects

Cons

  • spherical mirror specification (not elliptical) noted
  • customer insights unavailable
  • limited rating data available

Best For

  • DIY Newtonian telescope construction
  • refurbishing secondary mirror in small telescopes
  • optical axis alignment adjustments
  • prototype telescope experiments
  • education and hobbyist projects
  • spare part for reflective telescope builder

Features

  • Spherical mirror with aluminized surface and protective film
  • Dimension tolerance 0.5 mm for precise sizing
  • Surface accuracy PV 1/4-1/6 for optical quality
  • Designed as a secondary mirror for Newtonian astronomical telescopes
  • Intended to steer the optical axis in DIY Newtonian reflectors

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