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THE WIDESCREEN CENTER

Newtonian Optical Set NT-500

Product code: OS220
Manufacturer: Astrosib
Please contact us to confirm the price

Specifications: 

  • Primary mirror diameter - 500 mm
  • Primary mirror thickness - 50 ± 2 mm
  • Focal ratio - F/4.5
  • Focal length  - 2250 ± 10 mm
  • The size of a small axis of an elliptic diagonal mirror - 100 mm
  • Secondary diagonal mirror thickness - 15 mm
  • Mirrors material - LK-7 (low expansion optical glass)
  • Optical accuracy - 1/4 wave peak-to-valley of wave front or better and 1/25 wave RMS or better, Strehl Ratio is 0.95 or is higher.
    The interferometer test report is supplied with each optical set.
  • Coating of surfaces - Al + SiO2 (Quartz) overcoat


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