The sun occasionally broke through clouds despite the weather forecast predicting rain. Most of the time was spent waiting for the sun to peek through for 10 - 15 seconds.
I used a Baader 3.8 filter on a 180 Mak + 2X Powermate + Sulphur II filter + Blackfly S 3.2 Mp camera.
Lou
Sunspot in AR2833 on June 14
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Re: Sunspot in AR2833 on June 14
Sulfur II ! It's nice to see the less used filters get action here. WL, Ca II K and Ha may get the bulk of the solar data here but I feel that less used wavelengths certainly have something to add. Thanks for sharing these!!
James
James
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" 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: Sunspot in AR2833 on June 14
Interesting, Lou. Is it a particularly narrow bandwidth, or wide enough for continuum bleed through?
Nice images.
Stu.
Nice images.
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: Sunspot in AR2833 on June 14
Hi, Stu
The filter's bandwidth is 8nm at 673 nm. I decided to obtain one in a roundabout way.
I was always interested in trying to calm atmospheric seeing by using longer wavelengths for white light or pseudo white light imaging.
I once trying sandwiching a Baader 685 nm long pass with a UV/IR blocking filter since these 2 filters hand bandpasses that overlapped and produced a bandpass of around 670 nm (fwhm undetermined). This combination produced significant calming and it passed enough light to be useful but somewhat dark for higher resolutions.
I researched and found that Baader had a very narrow (8nm) Sulfur II filter that centred at 673 nm. It was brighter than the 685nm+UV/IR combination and did almost as good a job in atmospheric calming. I will always use it for higher resolution "white light" imaging (I mean it looks like white light).
Lou
The filter's bandwidth is 8nm at 673 nm. I decided to obtain one in a roundabout way.
I was always interested in trying to calm atmospheric seeing by using longer wavelengths for white light or pseudo white light imaging.
I once trying sandwiching a Baader 685 nm long pass with a UV/IR blocking filter since these 2 filters hand bandpasses that overlapped and produced a bandpass of around 670 nm (fwhm undetermined). This combination produced significant calming and it passed enough light to be useful but somewhat dark for higher resolutions.
I researched and found that Baader had a very narrow (8nm) Sulfur II filter that centred at 673 nm. It was brighter than the 685nm+UV/IR combination and did almost as good a job in atmospheric calming. I will always use it for higher resolution "white light" imaging (I mean it looks like white light).
Lou
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