My PST CaK mod.
- marktownley
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Re: My PST CaK mod.
Thanks guys, i hope it is 'just' a reflection off the back of the objective. I'll have a try this afternoon with the linear polariser if the storms stay away and the skies remain blue...
http://brierleyhillsolar.blogspot.co.uk/
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- Bob Yoesle
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Re: My PST CaK mod.
Following up on some experiments:
I tried the photographic circular polarizer (reversed on the near side of the SkyBender tilt plate) between the two PST no. 1 filters without success. An interesting finding was that reversing the Baader CaK filter greatly improved the separation of the major reflections, some of which are seen in Mark's videos on the preceding page. Alas however, the smearing reflection that overlies the primary image was still there.
21/08/14 @ 19:41 UTC
I also noticed only the first filter of the Baader CaK is tilted, the second one is normal to the optical axis. I'm beginning to think the best solution is the obvious one -- needing to tilt every component slightly ~ 1/2 to 3/4 a degree to minimize the reflections without shifting the filter passbands too much...
Bob
I tried the photographic circular polarizer (reversed on the near side of the SkyBender tilt plate) between the two PST no. 1 filters without success. An interesting finding was that reversing the Baader CaK filter greatly improved the separation of the major reflections, some of which are seen in Mark's videos on the preceding page. Alas however, the smearing reflection that overlies the primary image was still there.
21/08/14 @ 19:41 UTC
I also noticed only the first filter of the Baader CaK is tilted, the second one is normal to the optical axis. I'm beginning to think the best solution is the obvious one -- needing to tilt every component slightly ~ 1/2 to 3/4 a degree to minimize the reflections without shifting the filter passbands too much...
Bob
Diagonally parked in a parallel universe.
Curiosity is the father of knowledge; uncertainty is the mother of wisdom.
Dark-Sky Defenders
Goldendale Observatory
Curiosity is the father of knowledge; uncertainty is the mother of wisdom.
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- swisswalter
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Re: My PST CaK mod.
Hi Bob
thanks for sharing that information
thanks for sharing that information
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
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- marktownley
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Re: My PST CaK mod.
I've got a lot I need to add to this thread, I will be doing a big addition to it soon...
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!