A tall flame and AR12814
- krakatoa1883
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A tall flame and AR12814
Today a tall flame prominence is visible on the E limb, those who can shouldn't miss the view
Thanks for looking!
AR12814 in the southern hemisphere is growing although it is still of class B, it's more interesting in H-alpha than in visible light. Another small region is developing close to the SE limb and based on STEREO others will follow in the next days.Thanks for looking!
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- 2021-04-14-0749-WL-fulldisc.jpg (372.66 KiB) Viewed 476 times
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- 2021-04-13-1113-Halpha-AR12814.jpg (124.73 KiB) Viewed 476 times
Raf
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Re: A tall flame and AR12814
Nice imaging Raf, the prominence looks interesting.
Martin
Martin
H alpha : ,Skywatcher 120mm F8 open frame refractor, a tilted 2" 7nm H-alpha filter as a sub energy rejection filter, Baader TZ4 telecentric focal extender, Player One energy rejection filter, Combo Quark Chromosphere, Naked PST etalon for double stacking, ASI74mm camera
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Re: A tall flame and AR12814
Hello Raffaello,
Great work, I like these images a lot. Including the 1st one. I never thought about a small scope like a 50mm. I have a similar guidescope, a Altair 60mm guide scope with a F ratio of (225/60)=3.75
I wonder if I could use with a Quark ?
1) Did you upgrade the focuser on your Evoguide 50mm, as I understand it is a helical focuser.
2) Also the ASI178mm, I have not seen that used so much. It has small 2.4 um pixels. Did you focal reduce this to get to critical sampling as of :
http://www.wilmslowastro.com/software/f ... D_Sampling
You would best focal reduce to about F9 with your 50mm scope and 2.4micron pixel size at H-alpha.
Thanks Raffaello,
Magnus
Great work, I like these images a lot. Including the 1st one. I never thought about a small scope like a 50mm. I have a similar guidescope, a Altair 60mm guide scope with a F ratio of (225/60)=3.75
I wonder if I could use with a Quark ?
1) Did you upgrade the focuser on your Evoguide 50mm, as I understand it is a helical focuser.
2) Also the ASI178mm, I have not seen that used so much. It has small 2.4 um pixels. Did you focal reduce this to get to critical sampling as of :
http://www.wilmslowastro.com/software/f ... D_Sampling
You would best focal reduce to about F9 with your 50mm scope and 2.4micron pixel size at H-alpha.
Thanks Raffaello,
Magnus
Solar: H-alpha": Quark Chromosphere filter; Baader white light filters
Scopes: Altair Astro Travel ED70mm (F 420mm, D=70mm);; Skywatcher 90mm (F 910mm D=90mm); GSO focuser;;Altair Astro 60mm guidescope (D=60mm,F=225mm)
Cameras: ASI120mm-S,ASI174mm
Mount: SW HEQ5 Pro, SW EQ3 Pro Synscan (SW = Skywatcher),Vixen Polarie tracker (portable setup)
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Scopes: Altair Astro Travel ED70mm (F 420mm, D=70mm);; Skywatcher 90mm (F 910mm D=90mm); GSO focuser;;Altair Astro 60mm guidescope (D=60mm,F=225mm)
Cameras: ASI120mm-S,ASI174mm
Mount: SW HEQ5 Pro, SW EQ3 Pro Synscan (SW = Skywatcher),Vixen Polarie tracker (portable setup)
Accessory: SW Auto-focuser
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Re: A tall flame and AR12814
Thanks for your comments.
I am very happy of the 178 which is fine for full disc and in some instances also for hires. Having very small pixels it requires modest f/ratios and therefore the use of reducers as a 0.7x or 0.5x depending on the setup. For hires imaging a 174 would be a better alternative.
Hi Magnus, you can see the setup in this discussion. The focuser is fine and smooth, I had just to replace the original eyepiece holder with a better one.
I am very happy of the 178 which is fine for full disc and in some instances also for hires. Having very small pixels it requires modest f/ratios and therefore the use of reducers as a 0.7x or 0.5x depending on the setup. For hires imaging a 174 would be a better alternative.
Raf
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Re: A tall flame and AR12814
Very nice! I wish I could figure out how to get full discs with my Coronado SMII 90. Doesn't anyone make an optical element to half the focal length hence the magnification? Barlows/Powermates increase the FL hence doubling it or more.
Nice work on all three!
James
Nice work on all three!
James
Lunt 8x32 SUNoculars
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Re: A tall flame and AR12814
Nice images, Raf.
Stu.
Stu.
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
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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: A tall flame and AR12814
FD's are normally captured using a Focal Reducer James.
Checkout the website https://astronomy.tools/calculators/field_of_view/ where it gives options including FR's etc.
Should answer your question - I hope ??
Regards
Terry
Checkout the website https://astronomy.tools/calculators/field_of_view/ where it gives options including FR's etc.
Should answer your question - I hope ??
Regards
Terry
- krakatoa1883
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Re: A tall flame and AR12814
Thanks for comments, much appreciated
James, you can make use of a reducer like these below screwed on the standard nose of my 178MM the left one gives 0.52x the right one 0.35x (although it too is labelled as 0.5x). More expensive (and less aberrated) reducers are available from few suppliers as Baader Planetarium, however for your first tests the above can be fine and are also cheap, which one is best for you depends on focal length and sampling.DeepSolar64 wrote: ↑Thu Apr 15, 2021 3:27 pmI wish I could figure out how to get full discs with my Coronado SMII 90. Doesn't anyone make an optical element to half the focal length hence the magnification?
Raf
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Re: A tall flame and AR12814
Raf,
I will have to look around for a US dealer that carries these. Thanks. Where did you get these?
James
I will have to look around for a US dealer that carries these. Thanks. Where did you get these?
James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
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Re: A tall flame and AR12814
Simply go on ebay.com or Amazon and type "eyepiece focal reducer" in the search bar, otherwise you can find them from the usual dealers of eyepieces.
Raf
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