To fix the newton ring problem when do ha solar imging!

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To fix the newton ring problem when do ha solar imging!

Postby Sam » Fri Oct 11, 2013 2:13 am

many amaturs have this problem when do ha-solar imging.
the image show like this:
Image

this is because the sensor and the ha-filter is not parrallel.
a T2 Tilt-Adjuster can help to solve this problem.
you can find it in TS or OPT
Image

Here is a image from David Cortner show how it works
Image

More info please visit David's blog
http://www.davidcortner.com/slowblog/20130513s.php
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Re: To fix the newton ring problem when do ha solar imging!

Postby smerral » Mon Nov 25, 2013 11:00 am

Alternatively, you can defocus the image till the solar details disappear and capture a flat which you can then process in Registax. This method works better when you have a short f.ratio. The tilt adapter can cause differential focusing at shorter f.ratios, especially if you require a large tilt to remove the rings, although it is fine for close up work. To see how effective the defocusing can be, see my images under "CaK and Ha images - 24 Nov". :D
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Re: To fix the newton ring problem when do ha solar imging!

Postby Sam » Sun Dec 22, 2013 8:36 am

thanks very much
a flat is more easier :)
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Re: To fix the newton ring problem when do ha solar imging!

Postby riklaunim » Tue Dec 31, 2013 6:19 pm

Those vertical lines looks more like sensor "noise" that would show up always on flat frames - not related to tilting the camera. There are also on this Moon http://img703.imageshack.us/img703/21/z1q5.jpg from second thread.

If the camera would have strong Newton rings from Micron cover glass then they would be easily visible and not fixable by tilting. Non-paralel caused rins would be much weaker, but also "circular" :)
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Re: To fix the newton ring problem when do ha solar imging!

Postby Sam » Thu Jan 02, 2014 3:01 am

riklaunim wrote:Those vertical lines looks more like sensor "noise" that would show up always on flat frames - not related to tilting the camera. There are also on this Moon http://img703.imageshack.us/img703/21/z1q5.jpg from second thread.

If the camera would have strong Newton rings from Micron cover glass then they would be easily visible and not fixable by tilting. Non-paralel caused rins would be much weaker, but also "circular" :)


the newton ring is not very clean in this image.
but you can see it if you zoom out this image
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Re: To fix the newton ring problem when do ha solar imging!

Postby riklaunim » Thu Jan 02, 2014 6:47 am

Can't see them. If they are still there - they shouldn't be a problem at such low intensity (comparison below).
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firefly-mono2.jpg
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Re: To fix the newton ring problem when do ha solar imging!

Postby Sam » Thu Jan 02, 2014 11:27 am

this image is better
easy to see:D
thanks
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Re: To fix the newton ring problem when do ha solar imging!

Postby Sam » Mon Jun 30, 2014 5:44 am

another way to solve it is take a flat frame and remove it in software.
Here is a good tutorial:
http://www.schursastrophotography.com/s ... icle5.html
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Re: To fix the newton ring problem when do ha solar imging!

Postby sweiller » Sun Dec 27, 2015 10:59 pm

Hi,
Nex FirCapture 2.5.02 beta has an improved internal flat which is very efficient while you don't aim to another place. In that later case redo it !
++
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Re: To fix the newton ring problem when do ha solar imging!

Postby skywatcher » Wed Jan 06, 2016 12:12 pm

where can i download this version 2.5.02 beta ?
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