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

Redesigned with external dual 60mm solar etalon filters and an upgraded 2-speed 2" rack-and-pinion focuser, Coronado 's SolarMax III 70mm f/5.7 Double-Stacked 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 etalons 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 0.5Å bandpass, the SM3's two etalons reduce the bandpass to refine the observation experience to see prominences in high-contrast against the black backdrop of space while revealing surface granulation and texture that broader bandpasses are unable to resolve. Each etalon has an independent tuning system that gives users the ability to precisely and easily bring them on-band to improve cont...