Coronado Solarmax III 70mm- BF15 Double Stack

The SolarMax III (SMIII) is a 70 mm f/5.7 refractor equipped with 60 mm external hydrogen – alpha (H-α) filters (solar filters). Available in both single-stacked (<0.7 Å) and double-stacked (<0.5 Å) bandpasses and either 10 mm or 15 mm blocking filters. 

Experience darker backgrounds, sharper features, and higher contrast with the new SolarMax III series telescope. Get precise focus with its new user-friendly, two-speed rack-and-pinion focuser which comes with both coarse and fine focus controls. Additionally, the SMIII 70 mm includes external “True” H-α etalon filters giving higher contrast views and sharper features.

RichView Tuning

Coronado’s patented RichView tuning allows direct tuning of the primary etalon filter. The patented RichView tuning technology provides additional tuning range and an overall better way of adjusting the filter’s bandpass. Now you can tune for the highest contrast views of your favorite solar features without sacrificing image quality.

Double-Stack Option

Double Stacked models (<0.5 Å 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.  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 night time astronomy. It’s like having two scopes in one! Whether you are focusing on the solar edge or surface of features in the chromosphere, the SolarMax III 70 mm will give you breathtaking views. 

NOTE: Always point the telescope away from the Sun while removing filters. Never view the Sun without proper filter protection.

• Aperture: 70 mm.
• Focal Ratio: F/5.7.
• Focal Length: 400 mm. 
• Blocking Filter Aperture: 15 mm.
• Wavelength: H-Alpha.
• Solar Filter: 60 mm External H-Alpha Etalon.
• See the Sun in Vivid Detail!

• Solarmax III 70 mm OTA.
• Solarmax III 60 mm External Etalon X 2.
• Solarmax III 15 mm Blocking Filter.
• Sol Ranger Solar Finder.
• CEMAX 18 mm Eyepiece- 1.25-inch.
• Vixen Style Dovetail Rail.
• 2-inch Rack-and-Pinion Focuser – Dual Speed.
• T-Max Tuner
• Hard Carrying Case