AR2757 January 26th, 2020

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ffellah
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AR2757 January 26th, 2020

Post by ffellah » Sun Jan 26, 2020 9:47 pm

Hello all: yesterday I saw that we were going to have intervals of sun this morning. I woke up with the crazy idea to try high resolution with the PST etalon while my other better filter is out until end of February. I was happy to see that AR2757 was visible in some detail, even if the seeing was definitely borderline for high resolution. I am glad I got some images, even if they are not what you can expect with good seeing.

Clear skies to all !

Franco
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095205 AR2757 final mono.jpg
095205 AR2757 final mono.jpg (849.28 KiB) Viewed 418 times
095205 AR2757 final color.jpg
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Re: AR2757 January 26th, 2020

Post by rsfoto » Sun Jan 26, 2020 10:05 pm

Hi Franco,

Great close up

Rainer
regards Rainer

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Re: AR2757 January 26th, 2020

Post by ffellah » Mon Jan 27, 2020 1:47 am

Thank you, Rainer. I processed this second image, that seems to have a bit more detail. Probably a moment of better seeing.

Franco
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100241 AR2757 final mono.jpg
100241 AR2757 final mono.jpg (903.79 KiB) Viewed 394 times
100241 AR2757 final color.jpg
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Re: AR2757 January 26th, 2020

Post by Astrophil » Mon Jan 27, 2020 2:02 am

Very nice, Franco. It's great to see some hi-res images again. Hope your skies continue to be favorable.

Phil

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Re: AR2757 January 26th, 2020

Post by eroel » Mon Jan 27, 2020 2:05 am

Franco:
Nice images anyway.
Best regards,
Eric.

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Re: AR2757 January 26th, 2020

Post by Carbon60 » Mon Jan 27, 2020 6:44 am

Nice images, Franco. Looking forward to better conditions as the season progresses.

Stu.
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Re: AR2757 January 26th, 2020

Post by JochenM » Mon Jan 27, 2020 6:58 am

Seeing can indeed spoil the party from time to time. Still some pretty good looking captures there, Franco.

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Re: AR2757 January 26th, 2020

Post by krakatoa1883 » Mon Jan 27, 2020 10:49 am

Great details Franco, well done!
Raf
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Re: AR2757 January 26th, 2020

Post by ffellah » Mon Jan 27, 2020 11:30 am

Thank you very much Phil, Eric, Stu, Jochen and Raf for your nice comments.

Franco

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Re: AR2757 January 26th, 2020

Post by Montana » Mon Jan 27, 2020 12:25 pm

Wow! was this taken with a PST, amazing detail :bow :hamster:
Alexandra

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Re: AR2757 January 26th, 2020

Post by MalVeauX » Mon Jan 27, 2020 12:55 pm

Excellent Franco, nice to see a real spot again!

Very best,

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Re: AR2757 January 26th, 2020

Post by ffellah » Mon Jan 27, 2020 1:02 pm

Hi Alexandra: thank you for your WOW ! I used the PST etalon on the 203mm HaT solar scope at F/27.5. Marty: thank you for your comments. Yes, it is very nice to see a real sunspot with light bridge and all. Hope we get more, now that Cycle 25 has supposedly started.

Franco
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Re: AR2757 January 26th, 2020

Post by bart1805 » Mon Jan 27, 2020 9:16 pm

Hi Franco,
Nice set-up. Second image is a big improvement!
Why do you choose to use the PST etalon in a Telecentric beam? You could choose to use it with the collimating lenses, the Celestron is f/10.
CS! Bart.

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Re: AR2757 January 26th, 2020

Post by ffellah » Tue Jan 28, 2020 1:25 am

Hi Bart: thank you for your feedback. According to Airylab you can use the PST etalon in this configuration: you remove it from the scope, take out the lenses and insert it after the telecentric. I use this etalon while my primary Solar Spectrum filter is back in CA for repair, as something happened to one coating and there was major loss of contrast. How is everything going with you ?

Franco

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Re: AR2757 January 26th, 2020

Post by ffellah » Tue Jan 28, 2020 2:05 am

This is the last image, processed differently in ImPPG and Photoshop. The light bridge is much more visible.

Franco
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Re: AR2757 January 26th, 2020

Post by bart1805 » Tue Jan 28, 2020 9:08 am

Hi Franco, looking at your images it works! I used the PST etalon with the lenses straight on my 7 inch Intes. AOK made an adapter to mount it directly to the back of the telescope. A PST etalon at f/27 is maybe a bit less narrow than in the original configuration with the lenses at f/10. Christian has written a lot about it.
It is going fine here, thanks for asking! Waiting for the sun to climb higher. My H-alpha train looks quite a bit like yours, after finding a secondhand SolarSpectrum:
Baader TZ3 - SolarSpectrum 0.5 - 0,4× telecompressor - camera. I can mount a PST etalon right after the SolarSpectrum to achieve a doublestack. In that configuration the PST etalon is used without the lenses. No first light yet, waiting for a TriBand Erf Valery is making.
CS! Bart.

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Re: AR2757 January 26th, 2020

Post by ffellah » Tue Jan 28, 2020 1:39 pm

Hi Bart: I can't wait to see your first light results !

Franco

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Re: AR2757 January 26th, 2020

Post by marktownley » Wed Jan 29, 2020 6:18 am

Good shots Franco, I will have to give this a go.
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Re: AR2757 January 26th, 2020

Post by ffellah » Wed Jan 29, 2020 11:39 am

Thank you, Mark

Franco

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