Thread: Solar AR's, filament and proms in Ha 27 Jan 2019
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Old 02-02-2019, 08:47 AM
SuperG
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Join Date: Oct 2014
Location: Sydney, NSW
Posts: 120
Ken, were these taken with the PST and double stack? Really nice images.

By the way, how does one go about getting a second etalon for a PST?
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