We've been having some nice weather here the last few days (fairly warm for the time of year), but no luck with clear enough skies. Until late afternoon today. I had just finished work, so perfect timing!
I figured the seeing would most likely not support any higher res work; so decided on some FD's (which I hadn't done in a while anyway). Quite happy with the outcome (and to be outside in a t-shirt ).
Setup:
HA: Lunt LS50, IMX178
CaK: 80ED (stopped down to 60mm), Lunt CaK b1800, IMX178
Thanks for looking.
2021-04-22 - A few quick FD's (HA/CaK)
- JochenM
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Re: 2021-04-22 - A few quick FD's (HA/CaK)
These looks really nice Jochen. Really nice contrast on the Ha image.
James
James
Lunt 8x32 SUNoculars
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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
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Re: 2021-04-22 - A few quick FD's (HA/CaK)
Hi Jochen,
Very nice, thank you for posting.
I am thinking of buying a Lunt LS50. Which version do you have ? Double stack and which size blocking filter ?
Any problems with gradients or Newton Rings. A member of my astronomy club has had problems with gradients across the sun and also Newton rings or interference bands.
Many thanks.
Magnus.
Very nice, thank you for posting.
I am thinking of buying a Lunt LS50. Which version do you have ? Double stack and which size blocking filter ?
Any problems with gradients or Newton Rings. A member of my astronomy club has had problems with gradients across the sun and also Newton rings or interference bands.
Many thanks.
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)
Accessory: SW Auto-focuser
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: 2021-04-22 - A few quick FD's (HA/CaK)
Thanks guys.
Magnus, I have the b600 single stack. Never had any newton rings issue with it. It does produce an interference pattern in combination with IMX178 chipset cameras (which is the ideal fit for this scope). However, these are my personal observations on that:
1) It only seems to occur when seeing is quite poor. I generally don't bother imaging at all anymore in those conditions and as such haven't encountered the issue in ages.
2) If it does happen, it's quite easy to fix and eliminate the pattern completely:
- Keep the exposure down a bit. Instead of exposing the histogram to the right (90% or so) which is fairly common for HA imaging; keep it down to 60-
70%. Brighten it up a bit in post-processing if that's your preferred style.
- Any minor pattern that still survives the above can be removed completely by applying an artificial flat (or a real flat if you're not lazy like me ).
Magnus, I have the b600 single stack. Never had any newton rings issue with it. It does produce an interference pattern in combination with IMX178 chipset cameras (which is the ideal fit for this scope). However, these are my personal observations on that:
1) It only seems to occur when seeing is quite poor. I generally don't bother imaging at all anymore in those conditions and as such haven't encountered the issue in ages.
2) If it does happen, it's quite easy to fix and eliminate the pattern completely:
- Keep the exposure down a bit. Instead of exposing the histogram to the right (90% or so) which is fairly common for HA imaging; keep it down to 60-
70%. Brighten it up a bit in post-processing if that's your preferred style.
- Any minor pattern that still survives the above can be removed completely by applying an artificial flat (or a real flat if you're not lazy like me ).
- MAURITS
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Re: 2021-04-22 - A few quick FD's (HA/CaK)
Thanks Jochen, that is really helpful.
Hope to have a Lunt LS50 or LS60 soon.
Magnus
Hope to have a Lunt LS50 or LS60 soon.
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)
Accessory: SW Auto-focuser
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: 2021-04-22 - A few quick FD's (HA/CaK)
Some super fine discs Jochen I am so glad the sunny weather has reached Belgium too
Alexandra
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Re: 2021-04-22 - A few quick FD's (HA/CaK)
Thanks Maurits/Alexandra.
Looks like the nice weather will last throughout the weekend as well. Good times!
Looks like the nice weather will last throughout the weekend as well. Good times!
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Re: 2021-04-22 - A few quick FD's (HA/CaK)
Nice disks Jochen!
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!