Sunday Sun 3rd June_RCT_Ha

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Carbon60
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Sunday Sun 3rd June_RCT_Ha

Post by Carbon60 » Sun Jun 03, 2018 8:48 am

Lovely blue skies although with a hint of cloud building in the North and East and some haze starting to develop right where it shouldn't :evil:

RCT with the Lunt 35
IMG_3708 (2).JPG
IMG_3708 (2).JPG (181.17 KiB) Viewed 653 times
IMG_3709 (2).JPG
IMG_3709 (2).JPG (122.37 KiB) Viewed 653 times
and for Valery, the almost 'zero' movement on the thumbscrew under today's conditions.
IMG_3710 (2).JPG
IMG_3710 (2).JPG (211.82 KiB) Viewed 653 times
AR2712 close to the limb in Mono and Colour.

AS!3, Imppg and Pixinsight with Basler acA1920-155um + 2.5x Powermate.

Image20180603_AR2712_RCT_Mono by Stuart Green, on Flickr

Image20180603_AR2712_RCT_Colour by Stuart Green, on Flickr

Best viewed as the 'original' from Flickr.

The session was paused as I waited for the haze (precipitated from a contrail) to pass..... long wait!!

Thanks for looking.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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GreatAttractor
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Re: Sunday Sun 3rd June_RCT_Ha

Post by GreatAttractor » Sun Jun 03, 2018 10:04 am

Great resolution, Stu. I love the looks of the setup too.
My software:
Stackistry — an open-source cross-platform image stacker
ImPPG — stack post-processing and animation alignment
My images

SW Mak-Cass 127, ATM Hα scope (D=90 mm, LS50 etalon), Lunt LS50THa, ATM SSM, ATM Newt 300/1500 mm, PGR Chameleon 3 mono (ICX445)

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Valery
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Re: Sunday Sun 3rd June_RCT_Ha

Post by Valery » Sun Jun 03, 2018 1:54 pm

Hi Stu,

The result is clearly better than all before! Nice processing too.

I noted that you do use some oversampling. The image scale you do use with a 10" scope is significatly larger
than I do use with my 11" scope. Smaller scale will makes imaging easier - shorter exposure, larger FOV, better
seeing freezing and faster fps. I would recommend F/18-20 for a camera with IMX174 chip.

CS

Valery
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Re: Sunday Sun 3rd June_RCT_Ha

Post by marktownley » Sun Jun 03, 2018 3:59 pm

Nice to see the pics of your setup Stu, looks like it's delivering the goods. I got the HaT out first thing this morning but seeing was mush so put it straight away.
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Re: Sunday Sun 3rd June_RCT_Ha

Post by TheSkyBurner » Sun Jun 03, 2018 5:31 pm

You should get some teflon or nylon thumbscrews,,,, awesome setup.

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Re: Sunday Sun 3rd June_RCT_Ha

Post by MalVeauX » Sun Jun 03, 2018 6:11 pm

Interesting setup, I'm curious about how to rear-mount fast focal-ratio etalons behind larger scopes, be they SCT or refractor (though mainly interested in SCT at the larger apertures for compactness and weight). Especially finding a way to use a 50mm or 60mm etalon, instead of a PST etalon to avoid the quality of copy variation in the PST etalons, or simply getting a double stack unit and using that behind a larger scope, if possible. Would love to know more.

Very best,

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Re: Sunday Sun 3rd June_RCT_Ha

Post by rsfoto » Sun Jun 03, 2018 7:23 pm

WOW amazing images and interesting set up
regards Rainer

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eroel
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Re: Sunday Sun 3rd June_RCT_Ha

Post by eroel » Sun Jun 03, 2018 9:14 pm

Stu:
Beautiful setup and results.
Regards,
Eric.

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Re: Sunday Sun 3rd June_RCT_Ha

Post by Montana » Mon Jun 04, 2018 6:57 am

Some superb detail there Stu, looking good!! :bow :hamster:
Alexandra

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Re: Sunday Sun 3rd June_RCT_Ha

Post by ffellah » Mon Jun 04, 2018 11:41 am

Great images, Stu and beautiful looking set-up.

Franco

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Carbon60
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Re: Sunday Sun 3rd June_RCT_Ha

Post by Carbon60 » Mon Jun 04, 2018 6:33 pm

Many thanks everyone for your kind comments. Like all these things, practice and homing in on things that work are what count.....and I'm still learning! AR2712 is/was a particularly spectacular target with loads of dramatic structures on a large scale.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Sunday Sun 3rd June_RCT_Ha

Post by Carbon60 » Mon Jun 04, 2018 6:45 pm

Valery wrote:
Sun Jun 03, 2018 1:54 pm
Hi Stu,

The result is clearly better than all before! Nice processing too.

I noted that you do use some oversampling. The image scale you do use with a 10" scope is significatly larger
than I do use with my 11" scope. Smaller scale will makes imaging easier - shorter exposure, larger FOV, better
seeing freezing and faster fps. I would recommend F/18-20 for a camera with IMX174 chip.

CS

Valery
Thanks for your feedback, Valery. I processed these using the re-sampling x2 function in Autostakkert 3 which made the image quite large, but my thinking was that this would yield finer detail in the stacked image. Maybe I should use 2x2 binning to reduce the exposure time as well.

I think the scope is running at about F35 with a 2.5x Powermate. Maybe I should use a 1.5x barlow instead to bring it closer to F20.... more experimentation to be done. I was just so pleased to be able to capture something worthwhile before the sky conditions deteriorated.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Sunday Sun 3rd June_RCT_Ha

Post by Valtori » Mon Jun 04, 2018 6:58 pm

Hi Stu,

Very pleased results with such aperture!!

Val

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Re: Sunday Sun 3rd June_RCT_Ha

Post by Carbon60 » Mon Jun 04, 2018 7:04 pm

MalVeauX wrote:
Sun Jun 03, 2018 6:11 pm
Interesting setup, I'm curious about how to rear-mount fast focal-ratio etalons behind larger scopes, be they SCT or refractor (though mainly interested in SCT at the larger apertures for compactness and weight). Especially finding a way to use a 50mm or 60mm etalon, instead of a PST etalon to avoid the quality of copy variation in the PST etalons, or simply getting a double stack unit and using that behind a larger scope, if possible. Would love to know more.

Very best,
Hi Marty,
I employ a collimating lens mounted inside the rear of the scope of an appropriate focal ratio to produce parallel rays for the etalon. The Lunt 35 seems to work quite well since the etalon(s) are front mounted.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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