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Heads-up PST-CaK....


David Smith

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Yep, primarily for imaging purposes. Unless you are very young or had cataracts removed apparently.

For me personally, despite all the fantastic H alpha images you see, it's the CaK images that I find the most fascinating.

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Yep, primarily for imaging purposes. Unless you are very young or had cataracts removed apparently.

For me personally, despite all the fantastic H alpha images you see, it's the CaK images that I find the most fascinating.

There is an interesting paragraph in the Baader Wedge safety instructions which basically implies CaK scopes are dangerous for visual use. I'll post a copy of it tomorrow, but it says ( and I'm paraphrasing) that Baader cannot understand why these scopes are sold because looking at frequencies at or below 420nm is effectively looking at UV-A light ie not good for you!

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I think the phrase "primarily a visual instrument" comes from the original marketing info. I know a few people who've looked through them, myself included. If you can get excited about seeing a faint, featureless purple circle then it's a visual instrument. If you're a normal person then it's for imaging only. Great scopes, but only for a very small niche. I sold mine when I stopped imaging.

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Nice heads up, David, hope it goes to a good home.

I don't have funds anyway but I think CaK is off the menu for me, I struggle to get two lights done with our wonderful weather. The forecast here is cloud all day long for the whole bank holiday weekend! :eek:

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But then Baader sells a CaK filter.

For imaging only. Just copied this from the CaK filter info.

Please note: The Baader Ca K-Line filter is intended for imaging ONLY. It is not suitable for visual observation since the high UV levels can be an eye safety risk from prolonged observations. The CaK filter must be used in conjunction with a primary solar filter such as a Herschel Wedge Prism, or Baader AstroSolar Film (provided). The CaK filter must be placed after the primary filter (i.e. on the eyepiece), and cannot be used alone, or permanent eye and equipment damage will result. Also, due to the eye's low sensitivity and very poor resolving ability at 395nm, solar features in CaK are generally invisible for most observers.

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