JMI Telescopes 12" Parabolic Mirror Set

JMI Telescopes 12" Parabolic Mirror Set

JMI Telescopes 12" Parabolic Mirror Set


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Product Highlights

  • 12" Primary Aperture
  • 70mm Secondary Aperture
  • 1500mm Focal Length
  • SiO2 Protective Coating
  • Aluminum Reflective Coating
  • Diffraction Limited BK7 Glass
  • Approximately 93% Reflectivity
  • 1/16 Wave RMS Minimum
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JMI Telescopes MIRSET1250 overview

  • 1Description

The 12" Parabolic Mirror Set from JMI Telescopes is a primary and secondary mirror set for do-it-yourself telescope projects. Both elements have been precisely designed and engineered to meet exacting specifications at the Guan Sheng Optical factory. The primary and secondary mirrors are constructed of diffraction limited BK7 glass and feature an aluminum reflective coating and a SiO2 protective coating.

BK7 Glass
BK7 is a barium borosilicate optical glass known for its high transmission and clean, clear appearance.
Primary / Secondary Set
This mirror set includes a 12" primary mirror and 70mm secondary mirror, delivering a 1500mm focal length and f/5 light gathering ability.
Table of Contents
  • 1Description

JMI Telescopes MIRSET1250 specs

Aperture Primary: 12" / 305 mm (nominal); 11.97" / 304 mm (actual)

Secondary: 2.75" / 70 mm

Focal Length 1500 mm
Focal Ratio f/5
Thickness 35 mm (primary)
Weight Primary: 14.3 lb (6.5 kg); Secondary: 5.6 oz (159 g)

JMI Telescopes MIRSET1250 reviews

12" Parabolic Mirror Set is rated 4.0 out of 5 by 1.
Rated 4 out of 5 by from Perfectly shaped and incredibly securely packed for shipment The 12 primary reflector was ground exactly as needed and packed so well the shipper would have had a real challenge to damage it. It is really heavy, but that's to be expected for a glass reflector this size. Only real wish would be to have some key information in the package for design purposes, especially the focal length. I had to go back to the web site to get that information.
Date published: 2015-11-15
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