Sun FD in H-Alpha and CaK 19th of June 2021

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arnedanielsen
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Sun FD in H-Alpha and CaK 19th of June 2021

Post by arnedanielsen »

Hi all,

After being cloudy for the most of the day it cleared just long enough in the afternoon to grab a few shots. It was quite humid and hazy, but the seeing was good.

FD image in H-Alpha using the Takahashi Sky-90II with Coronado 90mm/BF15, Coronado 2x CeMax and ASI 1600mm PRO.
Sun90FD_145545_Ha_(Coronado_90mm_BF15)_20210619_ZWO ASI1600MM Pro_lapl4_ap6081_Sharpened_Contrast_resize.jpg
Sun90FD_145545_Ha_(Coronado_90mm_BF15)_20210619_ZWO ASI1600MM Pro_lapl4_ap6081_Sharpened_Contrast_resize.jpg (455.39 KiB) Viewed 271 times
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FD image in CaK using William Optics ZenithStar 61II stopped down to 46mm, Lunt Cak 1200 module and ASI 178mm camera.
SunCaK60_153713_CaK_(3934nm)_20210619_ZWO ASI178MM_lapl4_ap2799_out_Contrast_resize.jpg
SunCaK60_153713_CaK_(3934nm)_20210619_ZWO ASI178MM_lapl4_ap2799_out_Contrast_resize.jpg (278.48 KiB) Viewed 271 times
Full size image
SunCaK60_153713_CaK_(3934nm)_20210619_ZWO ASI178MM_lapl4_ap2799_out_Contrast_Colorized_resize.jpg
SunCaK60_153713_CaK_(3934nm)_20210619_ZWO ASI178MM_lapl4_ap2799_out_Contrast_Colorized_resize.jpg (305.31 KiB) Viewed 271 times
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Best regards,
Arne


Best regards,
Arne
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Ivan
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Re: Sun FD in H-Alpha and CaK 19th of June 2021

Post by Ivan »

Hi Arne

Very nice and contrasting FD. Are granules visible in the full-size picture (in the calcium line)?

Ivan


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Re: Sun FD in H-Alpha and CaK 19th of June 2021

Post by ffellah »

Very fine full disks Arne, thank you...

Franco


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Re: Sun FD in H-Alpha and CaK 19th of June 2021

Post by arnedanielsen »

Thank you Ivan and Franco.

Ivan: I don't think so. I'm not sure if the resolution is to low or if they are visible at all in CaK. Maybe someone else knows this better.

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Arne


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Re: Sun FD in H-Alpha and CaK 19th of June 2021

Post by marktownley »

Nice shots Arne! I can just about make out inverse granulation at 40mm when seeing and sampling are absolutely optimal. It's easier at 60mm though. (not 60mm f6 though - try 60mm f16!)


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Re: Sun FD in H-Alpha and CaK 19th of June 2021

Post by arnedanielsen »

Thank you, Mark!

Best regards,
Arne


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