SHG Images - July 7
- p_zetner
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SHG Images - July 7
Greetings Everyone.
The clouds, haze and smoke finally cleared to allow me to try out some spectroheliography.
I purchased a new camera (PGR Grasshopper, ICX694, 6Mp) which allows me to increase the magnification in my SHG.
Here are my first results (some system details are printed on the images).
Cheers.
Peter.
The clouds, haze and smoke finally cleared to allow me to try out some spectroheliography.
I purchased a new camera (PGR Grasshopper, ICX694, 6Mp) which allows me to increase the magnification in my SHG.
Here are my first results (some system details are printed on the images).
Cheers.
Peter.
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Re: SHG Images - July 7
Great results.
- Montana
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Re: SHG Images - July 7
Absolutely amazing pics Peter
fascinating to see all the different bands. I'm looking forward to seeing many more variety of bands for comparison
Alexandra






Alexandra
- p_zetner
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Re: SHG Images - July 7
Thanks Derek and Alexandra.
Here are some comparison images with the KIS - ChroTel telescope that I wanted to post.
(You guys are too fast with your responses!)
Cheers.
Peter.
Here are some comparison images with the KIS - ChroTel telescope that I wanted to post.
(You guys are too fast with your responses!)
Cheers.
Peter.
- Montana
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Re: SHG Images - July 7


Alexandra
Re: SHG Images - July 7
quality is unreal
- Merlin66
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Re: SHG Images - July 7
Peter,
The new camera certainly seems to be working well for you.
Your results are a credit to your dedication and ability.
The SHG is coming of age..............
The new camera certainly seems to be working well for you.
Your results are a credit to your dedication and ability.
The SHG is coming of age..............
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- marktownley
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Re: SHG Images - July 7
These are stunners Peter!

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!
- p_zetner
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Re: SHG Images - July 7
Many thanks for your kind comments, everyone!
I guess I'm slowly approaching the final configuration of the SHG. I'd like to experiment with some very high spectral resolution (tandem gratings) studies yet. I suppose it would be nice to increase the image magnification for close-up shots, but focusing becomes nightmarish at large magnifications. Generally uncooperative weather makes me hesitate to try out new configurations. If it's one of the infrequent good days for imaging, I'm inclined to haul out the tried-and-true apparatus!
I experimented a little with image processing on the Ca K3 image. For example, I've been reluctant to use deconvolution on the SHG images because I was afraid it might amplify the artifacts inherent to the technique. Nothing to lose in trying, though, and I'm pretty happy with the outcome! Here's my re-processed Ca K3 image. Probably a tad over-sharpened but significantly more detail than on the original.
Cheers.
Peter.
I guess I'm slowly approaching the final configuration of the SHG. I'd like to experiment with some very high spectral resolution (tandem gratings) studies yet. I suppose it would be nice to increase the image magnification for close-up shots, but focusing becomes nightmarish at large magnifications. Generally uncooperative weather makes me hesitate to try out new configurations. If it's one of the infrequent good days for imaging, I'm inclined to haul out the tried-and-true apparatus!
I experimented a little with image processing on the Ca K3 image. For example, I've been reluctant to use deconvolution on the SHG images because I was afraid it might amplify the artifacts inherent to the technique. Nothing to lose in trying, though, and I'm pretty happy with the outcome! Here's my re-processed Ca K3 image. Probably a tad over-sharpened but significantly more detail than on the original.
Cheers.
Peter.
- Montana
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Re: SHG Images - July 7
Wow! some superb filaments in there
Alexandra




Alexandra
- marktownley
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Re: SHG Images - July 7
It really is good Peter!

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!
Re: SHG Images - July 7
Stunning results!
I just wonder why it seems the solar poles in H-beta are featureless?
I just wonder why it seems the solar poles in H-beta are featureless?
- DSobserver
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Re: SHG Images - July 7
great HeD3 shot!!!!
- p_zetner
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Re: SHG Images - July 7
Thanks again, everyone!
Wah: It's comments like yours that make this forum so useful! I've gone back and noticed that my processing has been a little aggressive, so I lost detail in the vertical image direction. Here is a re-worked version with some of that detail restored. Let me know what you think.
Peter.
Re-worked H-beta.
Wah: It's comments like yours that make this forum so useful! I've gone back and noticed that my processing has been a little aggressive, so I lost detail in the vertical image direction. Here is a re-worked version with some of that detail restored. Let me know what you think.
Peter.
Re-worked H-beta.
Re: SHG Images - July 7
Peter, I notice that most of the images have dim left and right side and bright top and bottom.
Do you know what causes it?
I've tried to reduce such effect.
Do you know what causes it?
I've tried to reduce such effect.
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- p_zetner
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Re: SHG Images - July 7
Wah: There is apparently some vignetting in my device which becomes exaggerated upon processing. I try to minimize but have to decide, at some point, that I'm satisfied with the remaining field non-uniformity and leave it at that.
... and, finally, a bit more processing and a final mosaic of the four different views of the Sun on July 7.
Cheers.
Peter.
... and, finally, a bit more processing and a final mosaic of the four different views of the Sun on July 7.
Cheers.
Peter.
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