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Coronado Solarmax III 70mm - BF15 Double Stack For Sale

Price - $3,000.00

Ad Number: 248909

Posted: 20 Mar 2021

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I purchased this solar Hα telescope in January of 2020, but only set it up about a half-dozen times so it is Used but condition is pretty close to New. Hard Case has some minor scratches/scuffs on the exterior but the telescope is unblemished and optics are clean. The double stack etalons will allow tight bandpass (0.5 angstrom) observation of our Sun's chromosphere, allowing you to see Hα filaments, prominences, and sunspots. The filters can be removed, enabling the 70mm f/5.7 (400mm focal length) refractor behind it to be used for nighttime observing or photography, though visual observation will require a standard 1.25" diagonal (not included) on the back end since the Coronado diagonal also acts as an energy-rejection filter. Despite its seldom use I did take a couple decent photos with it, so for any astrophotographers reading this, please see Astrobin links One& Two for examples as to what I was able to capture with it. For visual users, please be aware those are false color images with increased contrast and the sun will be visually the deep red color of Hα, but with careful tuning of the various filters the same details (prominences in particular) will be visible, just with less striking contrast.

- Telescope + double stacked etalons and a 15mm blocking filter
- Vixen dovetail with mounting rings + solar finder
- 18mm eyepiece in plastic container
- Hard case + keys for latch locks
- Manual / Instructions

Price: 3,000.00, shipping included within the US, PayPal preferred


  • Condition Like New
  • Location Wichita, KS

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