24 April: H alpha images at higher magnification.
- p_zetner
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24 April: H alpha images at higher magnification.
Hello Everyone.
Here are a few higher magnification images taken in H-alpha with my C8 Edge system (C8 Edge, Aries ERF, ~4.6x telecentric, Daystar 0.6A QPE, ~0.75x FR, Pt.Grey Grasshopper IMX174 cmos ). The Astrospheric app predicted a period of "excellent" seeing and actual conditions were consistent (intermittently) with the prediction but deteriorated a bit faster than forecast.
There are images of AR12816 and images of the field around AR12818 which included the very active emerging flux region S6831. Today (25Apr), S6831 has evolved into AR12820 and the entire region has become an extended active zone while AR12816 continues to decay.
Images are presented for effective focal lengths of ~ 9200mm (no FR) and ~ 7000mm (with FR). The seeing could support imaging at the shorter focal length but the high magnification results are a little soft. Typically, I stacked 25 frames out of 2000 to get reasonable sharpness (at the expense of some image noise).
Thanks for looking.
Peter
Here are a few higher magnification images taken in H-alpha with my C8 Edge system (C8 Edge, Aries ERF, ~4.6x telecentric, Daystar 0.6A QPE, ~0.75x FR, Pt.Grey Grasshopper IMX174 cmos ). The Astrospheric app predicted a period of "excellent" seeing and actual conditions were consistent (intermittently) with the prediction but deteriorated a bit faster than forecast.
There are images of AR12816 and images of the field around AR12818 which included the very active emerging flux region S6831. Today (25Apr), S6831 has evolved into AR12820 and the entire region has become an extended active zone while AR12816 continues to decay.
Images are presented for effective focal lengths of ~ 9200mm (no FR) and ~ 7000mm (with FR). The seeing could support imaging at the shorter focal length but the high magnification results are a little soft. Typically, I stacked 25 frames out of 2000 to get reasonable sharpness (at the expense of some image noise).
Thanks for looking.
Peter
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Re: 24 April: H alpha images at higher magnification.
Brilliant images Peter: I can imagine how challenging must be to shoot at those focal lengths. What is the 4.6x telecentric you are using ?
Franco
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Re: 24 April: H alpha images at higher magnification.
Yes Peter, you certainly have shown some excellent images and those frames are just right too.
Thanks vm
Terry
Thanks vm
Terry
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Re: 24 April: H alpha images at higher magnification.
Nice results 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!
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Re: 24 April: H alpha images at higher magnification.
Thank you all for the kind comments.
I've re-processed some of the images in inverted form. I actually like this view better than the direct, non-inverted images. There always seems to be the illusion of more detail.
Franco: The telecentric is a home designed / built optic. Let me know if you'd like more details.
Cheers.
Peter
I've re-processed some of the images in inverted form. I actually like this view better than the direct, non-inverted images. There always seems to be the illusion of more detail.
Franco: The telecentric is a home designed / built optic. Let me know if you'd like more details.
Cheers.
Peter
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Re: 24 April: H alpha images at higher magnification.
Peter:
Beautiful results working at those long focal lengths, specially when one does not have a superb seeing.
Best wishes.
Eric.
Beautiful results working at those long focal lengths, specially when one does not have a superb seeing.
Best wishes.
Eric.
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Re: 24 April: H alpha images at higher magnification.
Great work Peter.
Best wishes,
David
Best wishes,
David
Making the possible difficult and the difficult impossible.
Photos : https://www.flickr.com/photos/daviddench/albums/
Photos : https://www.flickr.com/photos/daviddench/albums/
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Re: 24 April: H alpha images at higher magnification.
Lovely captures Peter. Thanks for sharing.
10ft x 6ft Solar RoR with Warm Room
Lunt 60mm Double Stack HA
80ed WL+ Lunt Hershal Wedge + Badder K-Line filter.
100mm AR + Lunt b1800 Ca-K module.
Neq6 Eq Mount.
2.7m Pulsar Dome.
11in Celestron SCT + White Light Filter.
70mm AR Stellavue.
12inch OO Newtonian.
Eq8 r Pro Mount.
Lunt 60mm Double Stack HA
80ed WL+ Lunt Hershal Wedge + Badder K-Line filter.
100mm AR + Lunt b1800 Ca-K module.
Neq6 Eq Mount.
2.7m Pulsar Dome.
11in Celestron SCT + White Light Filter.
70mm AR Stellavue.
12inch OO Newtonian.
Eq8 r Pro Mount.
Re: 24 April: H alpha images at higher magnification.
A fine set of hi-res captures, Peter. Inverted images do bring out details overlooked. Nicely done.
Phil
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Re: 24 April: H alpha images at higher magnification.
Phil has just mentioned something that is very important about inverted/negative images.
Terry
Terry