Dismantling and modification of a PST CaK

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
bart1805
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Re: Dismantling and modification of a PST CaK

Post by bart1805 » Sat Nov 03, 2018 8:27 pm

TheSkyBurner wrote:
Sat Nov 03, 2018 7:27 pm
You can totally eliminate that baader planetarium K-filter (i would resell it), put the pst filter in the tilter instead so you can take blue wing images with a couple twists..
Maybe I will Apollo, but not before trying out all the different combinations I can come up with.

bart1805
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Re: Dismantling and modification of a PST CaK

Post by bart1805 » Sun Nov 04, 2018 10:47 pm

A lot of high clouds today and the sun is quite low here in the Netherlands. But at least I could give it a try. Used a Bresser Messier 127mm f/1200 mm stopped down to 10 cm.
Set up used was Baader Blue / Single Baader CaK / PST CaK #1 / Baader Blue / LuntB600.
With just the PST #1 filter (so no Lunt) the image was better than with just the B600 (so no #1 PST). Image was best when used both the Lunt filter and the PST #1 filter. Sun was a bit boring, and you can see the vignetting caused by the small Lunt Filter. Camera used was the ASI290mm.

ImageSun_123501_alles43063_PS by bart moors, on Flickr

Still a lot of experimenting and trial and error to be done in the near future, but at least it has started!

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marktownley
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Re: Dismantling and modification of a PST CaK

Post by marktownley » Mon Nov 05, 2018 7:01 am

Good result. That 290 is on my shopping list for next year.
Image
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!

bart1805
Im an EXPERT!
Im an EXPERT!
Posts: 303
Joined: Mon Feb 06, 2017 9:04 pm
Location: The Netherlands

Re: Dismantling and modification of a PST CaK

Post by bart1805 » Tue Nov 06, 2018 8:53 pm

Thanks Mark, I really like the 290.

bart1805
Im an EXPERT!
Im an EXPERT!
Posts: 303
Joined: Mon Feb 06, 2017 9:04 pm
Location: The Netherlands

Re: Dismantling and modification of a PST CaK

Post by bart1805 » Fri Nov 16, 2018 10:14 am

Received the second PST CaK today. Lower number: 50095. And I could screw the gold tube by hand of the blue ring. No force needed at all. Filter cell also unscrewed by hand, no force needed. Less glue was used to attach the filter to the retaining ring. So in about 3 minutes I had a second PST CaK #1 filter in a new cell. Doublestacking time!

Image20181116_104544_resized by bart moors, on Flickr

Image20181116_110410_resized by bart moors, on Flickr

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