Advice on refractor for WL
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Advice on refractor for WL
Hello,
I want to start making solar observations in white light with a solar wedge, I am going to buy one from Lunt in 1 1/4", I would like you to recommend a good refractor for this purpose, I don't know if it should have an ED lens or with a achromatic is enough for me, yes, I don't like to see CA in the image. I had some achromatic a while ago and for certain objects it was painful.Also looking advice for others accessories,like filters..
Well, thank you very much in advance.
a greeting
Fran.
I want to start making solar observations in white light with a solar wedge, I am going to buy one from Lunt in 1 1/4", I would like you to recommend a good refractor for this purpose, I don't know if it should have an ED lens or with a achromatic is enough for me, yes, I don't like to see CA in the image. I had some achromatic a while ago and for certain objects it was painful.Also looking advice for others accessories,like filters..
Well, thank you very much in advance.
a greeting
Fran.
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Re: Advice on refractor for WL
Hi Fran,
If you're restricting yourself to a 1-1/4" wedge I would get no more than a 100mm frac. What sort of budget do you have in mind? What sort of mount do you have?
Mark
If you're restricting yourself to a 1-1/4" wedge I would get no more than a 100mm frac. What sort of budget do you have in mind? What sort of mount do you have?
Mark
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Re: Advice on refractor for WL
Hi Fran
I would recommend a Skywatcher ED80 then, see if you can pick one up second hand with an upgraded focuser.
Mark
I would recommend a Skywatcher ED80 then, see if you can pick one up second hand with an upgraded focuser.
Mark
http://brierleyhillsolar.blogspot.co.uk/
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Re: Advice on refractor for WL
If you use filters like a Baader continuum 540nm filter an achromat will do just fine. The filter will remove any CA present. Without a filter I prefer an achromat F8 or above to reduce chromatic aberration.
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
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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
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
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Re: Advice on refractor for WL
That's very fast focal length!
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Re: Advice on refractor for WL
Such things exist?
I would recommend you a proper telescope with f/7 or more for this purpose of high magnification work on the sun. Certain scope abberations should be better controlled at this focal ratios.
Triband C9.25
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
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H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
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Re: Advice on refractor for WL
I actually prefer F8 or longer. I do have a little 70mm F7.1 refractor that does well though even though it has some CA if white light is done without a filter like the Baader Continuum.
Last edited by DeepSolar64 on Thu Oct 13, 2022 3:32 pm, edited 1 time in total.
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
" Way more fun to see it! "
- DeepSolar64
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Re: Advice on refractor for WL
The CA is slight for the Orion70 but still there. It generally doesn't bother me. If I choose I can always use a filter like the Baader 540nm which increases the contrast of the spots and totally eliminates the chromatic abberation. Many people here use achromats for photosphere work but use filters at the eyepiece in addition to a wedge or over the aperture filter to boost detail and eliminate false color. I also have an apochromatic doublet with two ED glass elements that is false color free. My Astro-Tech AT72EDII which I use with the Altair wedge.
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
" Way more fun to see it! "