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28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror
28 INCH Quartz Glass Reflector telescope Parabolic primary mirror

28 INCH Quartz Glass Reflector telescope Parabolic primary mirror

$ 5280

Availability: 100 in stock
  • Brand: DIY
  • Condition: New
  • Telescope Type: Reflector
  • Material: Quartz Glass
  • Country/Region of Manufacture: China
  • All returns accepted: ReturnsNotAccepted
  • Weight: 17kg
  • Item Diameter: 28inch
  • Compatible Brand: DIY
  • MPN: 2019
  • Type: mirror

    Description

    Paraboloidal primary mirror diameter of Outer circle716 mm,Effective diameter 713mm(≈28 INCH),the focal length of 2930 mm, I personally ground, polish, hand figure, no vacuum aluminum plated with . 266 times the perfect imaging（100-266X713）. Quartz Glass , edge thickness 25 mm, weight 17 kg(Quartz Glass 2.22g/cm3,Is the lightest glass). Coefficient of expansion approximately equal0,Quartz Glass,Melting point ≈boiling point=Cloud and mist,Surface bubble wear area<1%the measure Of area, <0.004 Magnitude.I will cover the shipping .Packing EPE model with carton,Ensure that no danger of anything going wrong.Delivery only primary mirror.
    Ronchi grating 4 lines per millimeter.