Sunspot 2645

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Sunspot 2645

Postby andrewscomputers » Fri Apr 07, 2017 5:11 pm

Hi all I took an image of the sunspot yesterday afternoon,hope you enjoy.
Andy
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Re: Sunspot 2645

Postby Aratus » Fri Apr 07, 2017 7:52 pm

Brilliant! These have been the only exciting thing to see on the sun for a while. You photographed them at their best though. They always look interesting on the limb. The great things about sun spots is they are always different every time!
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Re: Sunspot 2645

Postby andrewscomputers » Fri Apr 07, 2017 9:02 pm

Hi Aratus thanks for the comments again,I had my head in a cardboard box to avoid the glare from the sun,it took me a couple of hours to get the image as it shows every dust mark going on the filter and on my scope.
Thanks
Andy
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Re: Sunspot 2645

Postby Gfamily2 » Fri Apr 07, 2017 9:42 pm

andrewscomputers wrote:Hi Aratus thanks for the comments again,I had my head in a cardboard box to avoid the glare from the sun,it took me a couple of hours to get the image as it shows every dust mark going on the filter and on my scope.
Thanks
Andy

Ahem, post processing is a very efficient means of clearing dust from sensors.

I once spent a good 10 minutes 'pp-ing' dust marks from a lunar image before I realised that there were genuinely dark surfaced areas between Copernicus and the Mare Vaporum
Scopes: Meade 8" SCT, Skywatcher 127mm Mak, Raffle winner of SW ST80
For imaging: Pentax K5, Asda webcam, Star Adventurer (new toy)
For companionship: Mid Cheshire Astronomical Group.
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Re: Sunspot 2645

Postby andrewscomputers » Fri Apr 07, 2017 9:57 pm

Hi Gfamily2 I am going to give the filters a clean before I am going to use on the sun,sometimes it is hard to work out if it is on the image.
Thks
Andy
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Re: Sunspot 2645

Postby Gfamily2 » Fri Apr 07, 2017 10:30 pm

andrewscomputers wrote:Hi Gfamily2 I am going to give the filters a clean before I am going to use on the sun,sometimes it is hard to work out if it is on the image.
Thks
Andy

Definitely worth doing - but it's not the end of the world if something remains - ideally of course, we would take our 'flats' and use these to remove on-sensor artifacts.
Scopes: Meade 8" SCT, Skywatcher 127mm Mak, Raffle winner of SW ST80
For imaging: Pentax K5, Asda webcam, Star Adventurer (new toy)
For companionship: Mid Cheshire Astronomical Group.
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Re: Sunspot 2645

Postby The Man with the Corrugated Iron Roof » Sun Apr 09, 2017 12:17 am

The Sun in white light is the least forgiving of dust.
How can I be one with the universe when we don't know what 96% of it is.

My website: http://www.philippughastronomer.com/

My blog: http://sungazer127mak.blogspot.com/

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Re: Sunspot 2645

Postby Aratus » Sun Apr 09, 2017 1:45 pm

It is best to clean the sensor first rather than airbrush them out later - if possible. If you get good conditions you will see the granulations across the surface. It will be difficult to hide markes on that. Once the sensor is clean seal it with a clear filter, or cap to keep it that way. Philip is absolutely right about dust and the sun. If there is a speck of dust, then it will stand out against the sun every time. The sun also takes up the whole frame. With planets you can place the image on an uneffective part, so it isn't so crucial.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Re: Sunspot 2645

Postby andrewscomputers » Sun Apr 09, 2017 3:41 pm

Hi Aratus and Phil,I will give it both a go,but I don't want to clean the chip on the camera incase I damage the sensor as I am not sure if it has a class over it.The sun is not very forgiving for hiding the dust,also I might have it on the filter that I use as that seems to attract the dust being silver foil.
Thanks
Andy
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Re: updated Sunspot 2659

Postby andrewscomputers » Mon May 29, 2017 8:52 pm

HI all here is a couple of images of Sunspot AR2659 that I took on Friday 26/05/2017.
Hope you enjoy.
Thanks
Andy
Attachments
sun1.jpg
2659 modified
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sun.jpg
2659
sun.jpg (80.99 KiB) Viewed 1904 times
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