Sun today morning

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RomanH
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Sun today morning

Post by RomanH »

Hello,

I managed to get few images today morning in average to good seeing (it was improving until I had to go to work :D).

I used 155mm f8 APO and Daystar CaH and Ha filter. As a green filter I used narrowband (40nm) green filter from TS Herschel wedge. Multiplier was Televue powermate 4x, camera ASI 485 color. More resolution and info on click:

Green:
Image

CaH:
Image

Ha:
Image


Here also few older images reprocessed (more on https://astrofotky.cz/~rick):
Image

Image

Image


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rsfoto
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Re: Sun today morning

Post by rsfoto »

Beautiful


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Re: Sun today morning

Post by ffellah »

These look great ! Thank you for posting

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Re: Sun today morning

Post by GeorgeIonas »

Nice detail.

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Re: Sun today morning

Post by rigel123 »

Wonderful shots!


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Re: Sun today morning

Post by nicosolcy »

Great captures!


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Re: Sun today morning

Post by RomanH »

Thank you very much, I'm glad you like it :).


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Re: Sun today morning

Post by marktownley »

You got an excellent session there Roman! I particularly like the CaH, distinctly different than CaK. That TS 155mm seems to be a good performer at the short end of the spectrum.


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Re: Sun today morning

Post by robert »

Very nice images. I especially like the WL, lovely granulation.
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Re: Sun today morning

Post by RomanH »

marktownley thank you. its hard to get sharp results from CaH "thanks" to seeing, but I like thtat different look from ordinary green/continuum images. Just for info filter is about 10A wide, its really different also from Baader UV of CaK filters I tried in past. Also I am very glad that telescope perform very good in this wavelength. Report says that Strehl is 0.96 (probably at 555nm), but looks to be still better than 0.84 at 396nm.

robert: thank you, I really like that "high" resolution of the granulation - that you can actually resolve irregular shapes of it. I didnt think it can be achieved with only 6" aperture.


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Re: Sun today morning

Post by Montana »

These are absolutely delightful :bow :hamster:

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Re: Sun today morning

Post by vineyard »

I didn't think those two little sunspots could be made to look so beautiful. Excellent quality & excellent framing.


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Re: Sun today morning

Post by MapleRidge »

Superb images Roman :bow

The resolution is very detailed with each filter.

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Re: Sun today morning

Post by Bastelhannes »

RomanH wrote: Wed Jun 01, 2022 11:18 am marktownley thank you. its hard to get sharp results from CaH "thanks" to seeing, but I like thtat different look from ordinary green/continuum images. Just for info filter is about 10A wide, its really different also from Baader UV of CaK filters I tried in past. Also I am very glad that telescope perform very good in this wavelength. Report says that Strehl is 0.96 (probably at 555nm), but looks to be still better than 0.84 at 396nm.

robert: thank you, I really like that "high" resolution of the granulation - that you can actually resolve irregular shapes of it. I didnt think it can be achieved with only 6" aperture.
Roman,

Thank you for the beautiful images. You really inspired me for some new projects:
1. prepare a newton with an uncoated mirror for whitelight
2. build a setup with a tunable light source and artificial star (pinhole) to measure the Strehl of different telescopes at different wavelengths. (fulvio.mete, p_zetner, christian viladrich: ever thought about this?)


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Re: Sun today morning

Post by TareqPhoto »

Very nice results!

So, 150mm is possible for CaK and Ha then?!!!


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