Coronado SolarMax III 70mm f/5.7 H-alpha Solar Telescope

Redesigned with a new external 60mm solar etalon filter and an upgraded 2-speed 2" rack-and-pinion focuser, Coronado 's single-etalon SolarMax III 70mm f/5.7 H-alpha Solar Telescope builds on the success of their earlier iterations to provide users with a compact yet capable solar viewing optic. With the primary etalon now positioned externally, users can simply and easily remove the front solar and rear blocking filters to convert the SolarMax III into a competent nighttime viewing telescope - greatly increasing the scope's versatility. Specifically calibrated to isolate the hydrogen-alpha wavelength with a less than 0.7Å bandpass for observing prominences in high contrast against the black backdrop of space, the primary etalon comes equipped with their RichView tuning system to improve contrast and enhance views when atmospheric interference or Doppler-shift require you to bring the etalon back on-band. Directly adjusting the etalon enables it to be tuned up or down from the 6562.8Å H-a wavelength to rev...