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  #1  
Old 22-06-2018, 10:06 AM
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Merlin66 (Ken)
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New solar CaK filter stack

I've recently upgraded the Omega (four filter) CaK stack to include a Baader CCD (Blue) filter as an ERF. I also added a SkyBender filter tilter - to bring the 2A filter closer to CWL.

Been frustrated by the weather - if not rain then thick cloud...
Well, this morning there was thin high cloud so let's give it a go. Mounted on the ED80/HEQ5, with the ASI 174MM - Success!!!!!

The video files (to be processed ASAP) clearly show the current sunspot groups and large areas of bright flocculi.
So far so good.
Onwards and Upwards

If you haven't viewed the Sun recently now is the time -AR 713/4/5 easily visible! https://www.raben.com/maps/index.html
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Last edited by Merlin66; 22-06-2018 at 10:13 AM. Reason: photos added
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  #2  
Old 22-06-2018, 10:12 AM
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h0ughy (David)
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Fantastic news. Can you provide some images of the filter stack?
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  #3  
Old 22-06-2018, 10:19 AM
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David,
Images attached.

The 2" filter spacer tubes hold the Baader CCD-B well in front of the stack; inside the tube, in front of the gold SkyBender is a 390nm cut filter (acts as a secondary ERF) then about 30mm spacer to a 80nm bandwith 394nm CWL filter as a pre-filter then finally the 2A bandwidth, 393.7nm CWL mounted in the SkyBender.....

I'm impressed!!! It actually works!!!
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  #4  
Old 22-06-2018, 11:59 AM
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Quote:
Originally Posted by Merlin66 View Post
David,
Images attached.

The 2" filter spacer tubes hold the Baader CCD-B well in front of the stack; inside the tube, in front of the gold SkyBender is a 390nm cut filter (acts as a secondary ERF) then about 30mm spacer to a 80nm bandwith 394nm CWL filter as a pre-filter then finally the 2A bandwidth, 393.7nm CWL mounted in the SkyBender.....

I'm impressed!!! It actually works!!!
i am impressed what a cacophony of parts making this up?
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  #5  
Old 22-06-2018, 01:43 PM
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This image is probably representative of my ability to focus and tune the filter stack....
Processed in AS3!, no wavelets no curves.....
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  #6  
Old 22-06-2018, 01:50 PM
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thats awesome
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  #7  
Old 22-06-2018, 03:05 PM
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Thanks mate!

Some added colour and axis re-aligned....
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  #8  
Old 26-06-2018, 09:43 AM
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Quote:
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I'm impressed!!! It actually works!!!
To paraphrase Jeff Gouldblum "light will find a way".

Had to chuckle at the link you provided to the sunspot with the earth facing sun having a shaded side



Nice detail in your shots there.
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  #9  
Old 26-06-2018, 09:50 AM
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