Finally testing new CaK filter stack
- Merlin66
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Finally testing new CaK filter stack
I've recently upgraded the Omega (three 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.
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!!!
So far so good.
Onwards and Upwards
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.
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!!!
So far so good.
Onwards and Upwards
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Valery
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Re: Finally testing new CaK filter stack
Congratulates with a new setup version! But we'd like to see the images you took with it.
Valery
Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- Merlin66
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Re: Finally testing new CaK filter stack
SkyBurner, yeah.... I sent you an email about this SkyBender.....
Valery,
Just processing the images - coming soon...
Valery,
Just processing the images - coming soon...
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Merlin66
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Re: Finally testing new CaK filter stack
This image is probably representative of my ability to focus and tune the filter stack....
Processed in AS3!, no wavelets no curves.....
Processed in AS3!, no wavelets no curves.....
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Merlin66
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Re: Finally testing new CaK filter stack
A touch of colour and re-aligned axis.....
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Merlin66
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Re: Finally testing new CaK filter stack
I bought an ASI 183MM earlier this year to compliment the shorter focal length ED80 and "improve resolution" for solar imaging.
Cutting a looooong story very short, ZWO finally admitted "technical problems when the ASI 183 is used for narrow band solar imaging" and accepted a return.
I'm now looking seriously at the ASI 1600MM as a replacement.
Cutting a looooong story very short, ZWO finally admitted "technical problems when the ASI 183 is used for narrow band solar imaging" and accepted a return.
I'm now looking seriously at the ASI 1600MM as a replacement.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Valery
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Re: Finally testing new CaK filter stack
Thanks, Ken, for the images.
Seems to me that a single Lunt B600 CaK is much better than this army of filters and mechanics.
May be if good filters will become available, the skybender will get a good use.
Valery
Seems to me that a single Lunt B600 CaK is much better than this army of filters and mechanics.
May be if good filters will become available, the skybender will get a good use.
Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- Merlin66
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Re: Finally testing new CaK filter stack
I probably agree, but at a total price of a few hundred dollars it's much cheaper than the commercial options.....
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Valery
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Re: Finally testing new CaK filter stack
I'd better pay more for a real result, than pay several hundreds backs for doubtful result.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- marktownley
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Re: Finally testing new CaK filter stack
Cool setup Ken and nice results!
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!
- Merlin66
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Re: Finally testing new CaK filter stack
Thanks Mark, appreciate.
The conditions were far from ideal.
I hope to get better weather and a better camera soon.
The conditions were far from ideal.
I hope to get better weather and a better camera soon.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- marktownley
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Re: Finally testing new CaK filter stack
Something else to try Ken, imaging at that scale for full disk reduce the aperture - say 50mm, it will be much more friendly for the seeing and also put a slower light cone into the filters and tighter bandpass giving better contrast still.
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!
- Merlin66
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Re: Finally testing new CaK filter stack
Mark,
Thanks for the suggestion.
I’ll try it the next opportunity.
Thanks for the suggestion.
I’ll try it the next opportunity.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer