My friend Jean-Francois Pittet just posted this very nice image over at Astrosurf. He used a Solex on a Bresse4 127mm / 1200mm refractor. The camera was a QHY-178 (using 2x2 binning) and he used a Lacerta Herschel wedge to attenuate. He acquired using SharpCap and processed using our v3.7 software. He stacked using AS!3 (3 frames out of 10) and made a mosaic of 3 regions using iMerge.
I'm hoping to start imaging again shortly and my new project is to get my 140mm / 800mm telescope working with a new SHG upgrade.
A very high-resolution H-alpha SHG mosaic (morning Feb 15)
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A very high-resolution H-alpha SHG mosaic (morning Feb 15)
Last edited by thesmiths on Tue Feb 21, 2023 3:08 pm, edited 1 time in total.
- DeepSolar64
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
WoW, this is probably the highest resolution Ha SHG image I have seen! Awesome!! I would love to see some less-imaged wavelengths imaged at such high resolution.
James
James
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
HI Doug,
Amazing and I see I am light years away from getting such results
Amazing and I see I am light years away from getting such results
regards Rainer
Observatorio Real de 14
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North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
Rainer,
You are an intelligent and crafty individual. I think you can master the SHG. You do amazingly well on your full disks with " conventional " methods. I think you will get the SHG down in time.
Now to see you do it in CaK! I know, you have to walk before you can run!
James
You are an intelligent and crafty individual. I think you can master the SHG. You do amazingly well on your full disks with " conventional " methods. I think you will get the SHG down in time.
Now to see you do it in CaK! I know, you have to walk before you can run!
James
Lunt 8x32 SUNoculars
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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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Meade Coronado SolarMax II 60 DS
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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
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
Hi James,DeepSolar64 wrote: ↑Thu Feb 16, 2023 4:46 pm Rainer,
You are an intelligent and crafty individual. I think you can master the SHG. You do amazingly well on your full disks with " conventional " methods. I think you will get the SHG down in time.
Now to see you do it in CaK! I know, you have to walk before you can run!
James
I need to learn to crawl before I can walkI know, you have to walk before you can run!
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
True that, I guess...rsfoto wrote: ↑Thu Feb 16, 2023 5:19 pmHi James,DeepSolar64 wrote: ↑Thu Feb 16, 2023 4:46 pm Rainer,
You are an intelligent and crafty individual. I think you can master the SHG. You do amazingly well on your full disks with " conventional " methods. I think you will get the SHG down in time.
Now to see you do it in CaK! I know, you have to walk before you can run!
James
I need to learn to crawl before I can walkI know, you have to walk before you can run!
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
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
Really quite amazing!
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: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
That's amazing. Will we have image-quality parity between SHG and one-shot imaging in 5-10 years, I wonder?
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Re: A very high-resolution H-alpha SHG mosaic (morning Feb 15)
"One-shot" isn't really quite a single exposure, of course; but I see what you're getting at. SHG has the advantage in wavelength resolution but is more seeing limited. I think the largest aperture I've seen successfully used is 127mm (e.g. at the top of this post). Jean-Francois told me he tried a C8 but the seeing issues were too great.GreatAttractor wrote: ↑Mon Feb 27, 2023 6:06 pm That's amazing. Will we have image-quality parity between SHG and one-shot imaging in 5-10 years, I wonder?
I think SHG hits it's stride at around 100mm. The cost of full-disk 100mm aperture H-alpha is these days out of reach of almost all users. I think I put together my 106mm aperture SHG for less than US$1000 (not including the telescope, mount and camera).
I think versus 2014, a lot of progress has been due to improved cameras (smaller pixels, higher bandwidth, etc), better software and higher quality lithographic slits. Going forward, if USB-C were to replace USB3.0 in cameras there could be another 2x increase in acquisition speed (from 5 Gbit/s to 10), which will further improve image quality.