2021-04-25 - AR2818_2820 triband
- JochenM
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2021-04-25 - AR2818_2820 triband
Came back from some Sunday family time to a still beautiful sunny sky. According to the forecast, conditions could be fairly decent for some imaging. So I quickly set up before the sun would dip too low.
Decided to focus on the most prominent feature on the disk right now (AR2818 and 2820). Started the session with some CaK; switched to WL after and HA last. By the time I got to the HA; the sun was quite low in the sky already and it shows in the images (which is to be expected). But overall, nice session to end a sunny weekend with.
Setup:
CaK: 150mm achromat @ 120mm f15, Lunt CaK b1800, Baader Blue CCD, ASI290.
WL: 150mm achromat @ 120mm f25, Baader Herschel Wedge, Baader Solar Continuum, ASI290.
HA: 150mm achromat @ 120mm f42, Quark Chromosphere, Baader 35nm H-Alpha, ASI174.
Thanks for looking!
Decided to focus on the most prominent feature on the disk right now (AR2818 and 2820). Started the session with some CaK; switched to WL after and HA last. By the time I got to the HA; the sun was quite low in the sky already and it shows in the images (which is to be expected). But overall, nice session to end a sunny weekend with.
Setup:
CaK: 150mm achromat @ 120mm f15, Lunt CaK b1800, Baader Blue CCD, ASI290.
WL: 150mm achromat @ 120mm f25, Baader Herschel Wedge, Baader Solar Continuum, ASI290.
HA: 150mm achromat @ 120mm f42, Quark Chromosphere, Baader 35nm H-Alpha, ASI174.
Thanks for looking!
- H-Alpha
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Re: 2021-04-25 - AR2818_2820 triband
Thanks for sharing!
I really like your WL.
Can you please explain a bit the "150mm achromat @ 120mm f25" for your WL?
1) Does this mean that you masked your 150mm at 120 mm?
2) And f25 means that you used some barlow or FFC after the Baader wedge?
3) Can you please describe or show any extensions/barlows and their positions?
Once more congratulations for your WL!
Best wishes,
Alexandros
I really like your WL.
Can you please explain a bit the "150mm achromat @ 120mm f25" for your WL?
1) Does this mean that you masked your 150mm at 120 mm?
2) And f25 means that you used some barlow or FFC after the Baader wedge?
3) Can you please describe or show any extensions/barlows and their positions?
Once more congratulations for your WL!
Best wishes,
Alexandros
Alexandros
Lunt 130MT+1800BF, C8 Ultima PEC+AstroSolar, Skywatcher Mount EQ6-R Pro
Baader Solar Prism, ZEISS Abbe Barlow 2x, Celestron Barlow 2x Ultima Series
ZWO ASI290MM, ZWO ASI1600MM Pro,
Greece
Lunt 130MT+1800BF, C8 Ultima PEC+AstroSolar, Skywatcher Mount EQ6-R Pro
Baader Solar Prism, ZEISS Abbe Barlow 2x, Celestron Barlow 2x Ultima Series
ZWO ASI290MM, ZWO ASI1600MM Pro,
Greece
- JochenM
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Re: 2021-04-25 - AR2818_2820 triband
Thanks guys.
Alexandros, it's pretty much exactly like that. I mask the scope (an 150 f8) down to 120mm, making it f10. Add a 1.5 and 2.5 barlow respectively and that's that. The reasoning is multifaceted:
- Catering to the local seeing conditions here.
- Significantly reducing the scope's spherical aberration (for CaK mainly). Or well, working around it I suppose.
- Those specific focal ratio's work quite well (in this setup) for the filters being used as well as sampling for the camera.
I don't have any pictures available, but it's very straightforward:
Masked scope -> diagonal with filters -> barlow -> camera.
Alexandros, it's pretty much exactly like that. I mask the scope (an 150 f8) down to 120mm, making it f10. Add a 1.5 and 2.5 barlow respectively and that's that. The reasoning is multifaceted:
- Catering to the local seeing conditions here.
- Significantly reducing the scope's spherical aberration (for CaK mainly). Or well, working around it I suppose.
- Those specific focal ratio's work quite well (in this setup) for the filters being used as well as sampling for the camera.
I don't have any pictures available, but it's very straightforward:
Masked scope -> diagonal with filters -> barlow -> camera.
- rcwinter
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Re: 2021-04-25 - AR2818_2820 triband
Brilliant images, love the Cak colour and Ha
Thanks for sharing
Rich
Thanks for sharing
Rich
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Re: 2021-04-25 - AR2818_2820 triband
Thanks a lot Jochen!
You give me lots of hope that with my Lunt130MT that I am waiting to arrive and the Baader wedge, I may have similar results! :-)
Alexandros
You give me lots of hope that with my Lunt130MT that I am waiting to arrive and the Baader wedge, I may have similar results! :-)
Alexandros
Alexandros
Lunt 130MT+1800BF, C8 Ultima PEC+AstroSolar, Skywatcher Mount EQ6-R Pro
Baader Solar Prism, ZEISS Abbe Barlow 2x, Celestron Barlow 2x Ultima Series
ZWO ASI290MM, ZWO ASI1600MM Pro,
Greece
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ZWO ASI290MM, ZWO ASI1600MM Pro,
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- Carbon60
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Re: 2021-04-25 - AR2818_2820 triband
Excellent images, Jochen, especially the WL image. Very nice indeed.
Stu.
Stu.
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: 2021-04-25 - AR2818_2820 triband
Fabulous images Jochen and show so well what is happening in this particular-region.
In fact overnight, there are now three AR's in this fiasco as AR2821 has been added to 2820 & 2818...
Not seen that for a very long-time...
Regards
Terry
In fact overnight, there are now three AR's in this fiasco as AR2821 has been added to 2820 & 2818...
Not seen that for a very long-time...
Regards
Terry
- marios i.
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Re: 2021-04-25 - AR2818_2820 triband
Very nice images
Marios S.Ioannou
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Re: 2021-04-25 - AR2818_2820 triband
All of these are nice Jochen but the white light is the most impressive. The individual granules are easily seen in your WL images. I certainly hope to get this kind of resolution in my images sometime. The biggest solar capable scope I have is a 102mm and I rarely have good enough seeing to use it optimumly.
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Astro-Tech AT72EDII with Altair solar wedge
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Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
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Astro-Tech AT72EDII with Altair solar wedge
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- JochenM
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Re: 2021-04-25 - AR2818_2820 triband
Thanks for looking and commenting everyone; I appreciate it.
You'll get there, James! The 102mm should be plenty to resolve some nice detail. Seeing is however the big struggling point indeed. Over here it's extremely variable; going from absolutely brilliant and quite capable of shooting fairly high res down to situations where imaging a full disk with a small aperture is already a challenge for acceptable results.
I tend to keep a close eye on the weather forecasts (and predicted seeing values for a rough idea) and try to pick my sessions accordingly whenever possible.
You'll get there, James! The 102mm should be plenty to resolve some nice detail. Seeing is however the big struggling point indeed. Over here it's extremely variable; going from absolutely brilliant and quite capable of shooting fairly high res down to situations where imaging a full disk with a small aperture is already a challenge for acceptable results.
I tend to keep a close eye on the weather forecasts (and predicted seeing values for a rough idea) and try to pick my sessions accordingly whenever possible.
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Re: 2021-04-25 - AR2818_2820 triband
Top shots Jochen, like the set a lot!
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: 2021-04-25 - AR2818_2820 triband
Super images Jochen: I could see your WL image in a solar astronomy book.
Franco
Franco
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Re: 2021-04-25 - AR2818_2820 triband
Thanks Mark/Franco.
Probably my best WL image to date. Book worthy might be pushing it a bit, but appreciate it
Probably my best WL image to date. Book worthy might be pushing it a bit, but appreciate it