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Coronado Telescope

Coronado Telescope
Coronado has been developing ultra-narrowband filters and associated technologies for the professional market for well over 40 years. For the past six years they have been providing innovative optics specific to the needs of the amateur and professional solar observer. They have great products at reasonable prices.


Coronado Ha filters is the best way of viewing the sun since it isolates the Hydrogen-Alpha (Ha) wavelength at 656.3nm while rejecting all other kinds of light. At this wavelength, features of the chromospheres can be viewed. The views of the sun are dynamic so each view through a Coronado filter is always thrilling, whether looking at the sunspot group or see a prominence explode thousands of miles into space.

The new Coronado telescope, which is the Personal Solar Telescope (PST), has tunable views of prominences and surface detail. It has the bandpass of 1.0 angstrom yet is also thermally stable, and easy to use. This has the same technology used in the other SolarMax series telescope. It has unique design characteristics that makes it affordable than other first-class eyepieces, at the list price of $3,199.00.

The specifications are an aperture of 40mm, focal length of 400mm, f/ratio of f/10, and bandwidth of 1.01 - 0.61. Its thermal stability is at 0.005 A/C and full blocking is 10-5 from EUV to far IR. The PST is made from milled aluminum and definitely not from plastic material. Moreover, it comes with a built in "Sol Ranger" finder for trouble-free alignment and it has a re-usable box with dye-cut foam for safe storage. The SolarMax 40 telescope comes standard with a clamshell mounting ring and hard travel case. Optional accessories include CEMAX series eyepieces and Sol Ranger sun finder.

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