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Early PST results


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Coronado makes one in Calcium K now. It's the opposite end of the spectrum-blue/violet- and gives an interesting contrast to the H-A. I'd imagine the cost would be somewhat less, considering Ca-K is a wider line.

I saw one of these in action last week, while filming for a S@N Sun special. The scope delivers a blue/violet disk but it's very difficult to see any detail - apart from the blue disk! I believe that the scope isn't designed for visual use but is supposed to be used in conjunction with a camera. The set-up I saw was coupled to a Watec video camera and delivered a beautiful image. I think the cost is the same as the H-alpha PST.

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The features seen at CaK will be a lot more subtle than Ha. That's about what I would expect, but I'm sure with practice, you could see some neat stuff. Thanks for the quickie review, Starman, and the images you linked are fantastic! If I have time tomorrow, I'd like to describe some of the salient features one or two of them, if I may. Unless you'd like to reserve that for yourslef, of course.

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