Brief Sunshine on the 23rd July

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marktownley
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Brief Sunshine on the 23rd July

Post by marktownley »

An early morning start to lovely blue skies had me optimistic today, so I decided to start with the HaT, Quark, SSM and the IMX174 to see how I got on with this setup. All seemed fine and dandy as I focused the image on the laptop screen and I fired off an image, only to have 2 nasty surprises. Firstly the seeing took an A - bomb, and then I realised I was getting some horizontal artefacts with the camera. Firstly the seeing;

Imageseeing by Mark Townley, on Flickr

You can see it was nice low seeing values on the SSM then cloud started to appear from the south and totally wiped out any hope I had with large apertures for today. I did manage the one image at hi-res of the active region which has significantly diminished since yesterday:

ImageAR-close-bw by Mark Townley, on Flickr

ImageAR-close-colour by Mark Townley, on Flickr

I since determined the horizontal bands were there when the SSM was being used - hmmmm. So seems is some kind of interference thing. More experiments needed.

I also found if you turn the histogram off in firecapture when capture takes place the frame rate goes up considerably, same with not having the preview on max either. Kinda obvious really!

I then spent some considerable time blasting out runs at 170fps to try and freeze the seeing, but the graph says it all, so after a while gave up and reverted to a DS full disk with the Lunt50 etalon, ED60/f6, Quark, 0.7x solar telecompressor and the ICX916M camera (this is much better than the IMX174).

ImageHa-Full-Disk-bw by Mark Townley, on Flickr

ImageHa-Full-Disk-colour by Mark Townley, on Flickr

The full disk was soft with the boiling seeing and the temperatures climbing up into the low 30s. No more sun for me today, too hot - so off for a jar down the pub.

Hope you like!

Mark


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Re: Brief Sunshine on the 23rd July

Post by ffellah »

A great set, Mark ! I like very much the AR close up with the HAT, lots of detail there. Thanks for the tip on turning off the histogram to increase frame rate, I would have not thought of that. The FD came out really well, nice and even, with good detail too. You made the best of a challenging session...

Franco


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Re: Brief Sunshine on the 23rd July

Post by PaulB »

It's tricky doing any kind of astronomy from the UK. If it's not cloud-bright Moonlight. Then it is a clear sky followed by high cirrus, or like today. It's just too dam hot.

You've managed to capture some excellent detail in the Photosphere. Your Quark is a good piece of kit.

I will hopefully be doing the same over the weekend with my PST unless we have thundery rain!


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Re: Brief Sunshine on the 23rd July

Post by Carbon60 »

You've got a good Quark Mark. Mine ended up going back for a refund.

Nice images. I sometimes see the same type of horizontal lines with my Basler 1920-155um. Not sure what the cause is. I hope it isn't some level of degradation within the camera/chip.

Stu.


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Re: Brief Sunshine on the 23rd July

Post by MAURITS »

Well done Mark.


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Re: Brief Sunshine on the 23rd July

Post by MapleRidge »

Very nice images from this morning's session...too bad the clouds interfered :bow

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Re: Brief Sunshine on the 23rd July

Post by marktownley »

Thanks everyone. The horizontal lines thing has annoyed me a bit tbh as I wanted to use this camera with the SSM - like I said, more experiments needed. Fingers crossed for some wednesday sunshine, first some thunderstorms over night...


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Re: Brief Sunshine on the 23rd July

Post by LTHB »

Nice close-up!

Good luck with the weather! Meteoblue's seeing predictions for tomorrow are quite good, so maybe a chance for high-res imaging!

Regards,

Frank


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Re: Brief Sunshine on the 23rd July

Post by Montana »

You certainly have a good close up of the AR Mark, so when the seeing isn't 10+ :shock: you should be able to get some good ones :) the full discs are excellent as usual :bow :hamster:

Alexandra


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