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Coronado SolarMax III 90mm Solar Telescope with RichView System and BF15

90mm f/8.9 refractor equipped with 90mm external hydrogen – alpha (H-α) filters

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The SolarMax III is a 90mm f/8.9 refractor equipped with 90mm external hydrogen – alpha (H-α) filters. The SM3 90mm has a new two-speed rack & pinion focuser, which creates a more user-friendly interaction with the telescope. The two-speed, 2” focuser has both coarse and fine focus controls allowing the user to get a more precise focus, critical for both solar imaging and visual observing.

Additionally, the SM3 90mm includes only external “True” H-α etalon filters giving higher contrast views and sharper features compared with models using smaller internal H-α etalon designs. Experience darker backgrounds, sharper features, and higher contrast with the new SolarMax III series telescope.

The patented RichView tuning technology provides additional tuning range and an overall better way of adjusting the filters bandpass. Now you can tune for the highest contrast views of your favorite solar features without sacrificing image quality.

Double Stacked models (<0.5Å bandpass) include two “True” external etalon filters. One etalon filter equipped with our patented RichView tuner and second etalon with tip-tilt tuning using Coronado’s T-Max tuner. Whether you are focusing on the solar edge or surface features in the chromosphere, the SolarMax III 90mm is the solar scope for you. Since both etalon filters are now external to the telescope, you can easily remove both filters and rear blocking filter diagonal to use the scope as a normal refractor for nighttime astronomy. It’s like having two scopes in one!

The kit includes:

  • Telescope
  • 12mm, 18mm, 25mm CEMAX eyepieces
  • CEMAX 2x Barlow lens
  • Sol Ranger™ Solar Finder
  • Vixen-style dovetail mounting rail
  • Black and gold aluminum hard carry case