20 Mar 2012 White Light - Full Disc
20 Mar 2012 White Light - Full Disc
Here is another from me comprising of 10 images captured with a Canon 7D (1/250 second @ ISO 100) and stacked in registax.
Shot using the ED80 @ f/13 with Baader ND3.8 solar film and stacked Baader Continuum and UV/IR cut filters mounted on an Astrotrac TT320X-AG
I am fairly happy with the image but welcome your thoughts as well.
Thanks
Mark
Shot using the ED80 @ f/13 with Baader ND3.8 solar film and stacked Baader Continuum and UV/IR cut filters mounted on an Astrotrac TT320X-AG
I am fairly happy with the image but welcome your thoughts as well.
Thanks
Mark
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Re: 20 Mar 2012 White Light - Full Disc
I like the neat quadrate of sunspots right on the limb. Excellent processing!
Chris Schur
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Clear Creek Canyon Observatory, Happy Jack, Arizona
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Re: 20 Mar 2012 White Light - Full Disc
Hi Mark
a very fine shot. Nice to see the new AR
a very fine shot. Nice to see the new AR
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Re: 20 Mar 2012 White Light - Full Disc
Great shot Mark! I reckon the shot taking end of things is sorted. What post processing do you do on your whitelight full disks? That is where you could probably eek a bit more out...
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Re: 20 Mar 2012 White Light - Full Disc
Tremendous work Mark
Yes do tell how you do your processing.
Alexandra
Yes do tell how you do your processing.
Alexandra
Re: 20 Mar 2012 White Light - Full Disc
Thanks all for your comments, really appreciated.
Great shot Mark! I reckon the shot taking end of things is sorted. What post processing do you do on your whitelight full disks? That is where you could probably eek a bit more out...
Tremendous work Mark
Yes do tell how you do your processing.
Alexandra
Yes sure! It might help with working out how I can improve things.
This image was captured as 18 DSLR frames with Registax 5.1 automatically picked the best 10 frames for stacking.
Once stacked I applied a very light adjustment of wavelets using the first slider. The valus was about 10.0.
After that I exported it as jpeg and loaded it into CS3 where I adjusted the levels a little to increase contrast.
Next I applied false colour using the colour balance tool then desaturated it until the colour was natural looking.
Lastly I applied USM at amount = 20, radius = 1px
What I noticed is that if I use more aggressive settings the whole disc looked better but the zoomed in view looked quite noisy and the sunspots looked blocky.
I guess since I am doing full discs, how it looks at full disc is more important than at pixel level.
Here is the raw image which I have used to produce this final image.
I welcome your thoughts and any suggestions on how to improve my workflow
Thanks in advance!
Mark
Great shot Mark! I reckon the shot taking end of things is sorted. What post processing do you do on your whitelight full disks? That is where you could probably eek a bit more out...
Tremendous work Mark
Yes do tell how you do your processing.
Alexandra
Yes sure! It might help with working out how I can improve things.
This image was captured as 18 DSLR frames with Registax 5.1 automatically picked the best 10 frames for stacking.
Once stacked I applied a very light adjustment of wavelets using the first slider. The valus was about 10.0.
After that I exported it as jpeg and loaded it into CS3 where I adjusted the levels a little to increase contrast.
Next I applied false colour using the colour balance tool then desaturated it until the colour was natural looking.
Lastly I applied USM at amount = 20, radius = 1px
What I noticed is that if I use more aggressive settings the whole disc looked better but the zoomed in view looked quite noisy and the sunspots looked blocky.
I guess since I am doing full discs, how it looks at full disc is more important than at pixel level.
Here is the raw image which I have used to produce this final image.
I welcome your thoughts and any suggestions on how to improve my workflow
Thanks in advance!
Mark
Re: 20 Mar 2012 White Light - Full Disc
Also here is the best single frame from the images picked for stacking
Mark
Mark
Re: 20 Mar 2012 White Light - Full Disc
Mjr Tom,
I think the image is great as it is, but I also think it can be even better. Try the following:
1- Get the image without any wavelet restoration applied, this is the image stacked out of the Registax without any sharpening.
2- Open the image in CS3.
3- Do the sharpening using: Filter-Shrpen-Smart Sherpening Use the following settings in Smart Sharpening:
Advanced: Checked
More Accurate: Checked
Remove: Lens Blurr (choose)
Amount: 98%
Radius: 2.5px
4- Then use your false color scheme or use the false color action that Ken Crawford did and shared with us. If you don't have it I can send it for you.
I applied these procedures on your image Stacked-NoWavelet-NoPP.jpg, which is very well captured. The result is shown below for reference.
I hope you like it,
Fernando
I think the image is great as it is, but I also think it can be even better. Try the following:
1- Get the image without any wavelet restoration applied, this is the image stacked out of the Registax without any sharpening.
2- Open the image in CS3.
3- Do the sharpening using: Filter-Shrpen-Smart Sherpening Use the following settings in Smart Sharpening:
Advanced: Checked
More Accurate: Checked
Remove: Lens Blurr (choose)
Amount: 98%
Radius: 2.5px
4- Then use your false color scheme or use the false color action that Ken Crawford did and shared with us. If you don't have it I can send it for you.
I applied these procedures on your image Stacked-NoWavelet-NoPP.jpg, which is very well captured. The result is shown below for reference.
I hope you like it,
Fernando
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Re: 20 Mar 2012 White Light - Full Disc
Wow big thanks Fernando
That really looks much crisper than my attempt.
I will try and follow your suggestions using the high resolution image and post my results back for a comparison
That really looks much crisper than my attempt.
I will try and follow your suggestions using the high resolution image and post my results back for a comparison
Re: 20 Mar 2012 White Light - Full Disc
Here is my attempt following your advice.
What is most noticeable is AR1434 splits into two discrete spots which my first attempt didn't resolve.
I used your sharpening settings and the following RGB values adjusted using CS3/Image Adjustments/colour balance.
Shadows:
R= +50
G= 0
B= -50
Midtone:
R= +50
G= 0
B= -50
Highlights:
R= +50
G= 0
B= -50
Hope you like it
What is most noticeable is AR1434 splits into two discrete spots which my first attempt didn't resolve.
I used your sharpening settings and the following RGB values adjusted using CS3/Image Adjustments/colour balance.
Shadows:
R= +50
G= 0
B= -50
Midtone:
R= +50
G= 0
B= -50
Highlights:
R= +50
G= 0
B= -50
Hope you like it
Re: 20 Mar 2012 White Light - Full Disc
Mjr. Tom,
I certainly like it very much !! :woohoo:
I can see a noticeable improvemente in contrast and sharpness in your reprocessing.
Very well done,
Fernando
I certainly like it very much !! :woohoo:
I can see a noticeable improvemente in contrast and sharpness in your reprocessing.
Very well done,
Fernando
Re: 20 Mar 2012 White Light - Full Disc
Thanks again for your help, it is much appreciated. :
Next step is to pick up a DMK41
Mark
Next step is to pick up a DMK41
Mark
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Re: 20 Mar 2012 White Light - Full Disc
Thanks Alexandra.
Decision time is... hmm....
PST or DMK41 for the next purchase?
What would you go for next?
Decision time is... hmm....
PST or DMK41 for the next purchase?
What would you go for next?
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Re: 20 Mar 2012 White Light - Full Disc
That would depend on what you are most desperate for
Views in hydrogen alpha or more images of white light
Alexandra
Views in hydrogen alpha or more images of white light
Alexandra
Re: 20 Mar 2012 White Light - Full Disc
Thanks Alexandra
I want both! :whistle:
Well I suspect I shall go for the CCD camera first although I really enjoy Ha viewing from what little I have experienced so far.
I want both! :whistle:
Well I suspect I shall go for the CCD camera first although I really enjoy Ha viewing from what little I have experienced so far.
Re: 20 Mar 2012 White Light - Full Disc
Mjr.Tom,
If you allow me, I'm with you on this. Pick the camera first then the Ha scope. If possible, get also the filters for enhanced WL imaging like Chris proposed (Continuum Solar Filter + UV/IR cut). This would be the perfect kit.
Best Regards and success with the new setup.
Fernando
If you allow me, I'm with you on this. Pick the camera first then the Ha scope. If possible, get also the filters for enhanced WL imaging like Chris proposed (Continuum Solar Filter + UV/IR cut). This would be the perfect kit.
Best Regards and success with the new setup.
Fernando
Re: 20 Mar 2012 White Light - Full Disc
Thanks Fernando
I do currently have 2" Baader Continuum and UV/IR rejection filters. They were used during the capture of the image in this thread
I shall resist the urge for Ha and improve my capture of White Light to start with.
I would like to capture closeups of active regions and this should be possible with the DMK camera and 2.5x Powermate which I already own.
The only other thing that is interesting me at the moment is a Baader Herschel wedge.
Is the resolution of a Herschel wedge a huge difference to front mounted solar film?
I do currently have 2" Baader Continuum and UV/IR rejection filters. They were used during the capture of the image in this thread
I shall resist the urge for Ha and improve my capture of White Light to start with.
I would like to capture closeups of active regions and this should be possible with the DMK camera and 2.5x Powermate which I already own.
The only other thing that is interesting me at the moment is a Baader Herschel wedge.
Is the resolution of a Herschel wedge a huge difference to front mounted solar film?
Re: 20 Mar 2012 White Light - Full Disc
Your resolution would be the about the same - limited by the actual seeing. But the contrast is around 3x more with the wedge. It is not cheap, so Id go for the camera first!
Chris Schur
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Birch Mesa Observatory, Payson Arizona
Clear Creek Canyon Observatory, Happy Jack, Arizona
----------------------------------
Birch Mesa Observatory, Payson Arizona
Clear Creek Canyon Observatory, Happy Jack, Arizona
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Re: 20 Mar 2012 White Light - Full Disc
Great stuff Mark, only thing i would add is to export from registax as a 16 bit tiff file, not a jpeg, will give you lots more data to play with.
PST or DMK - hmmmm, go for the PST
PST or DMK - hmmmm, go for the PST
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
Re: 20 Mar 2012 White Light - Full Disc
Thanks Mark
I shall do that next time!
Yeah I would agree with you in that way, the PST is the fun purchase the DMK is the sensible option :p
I shall do that next time!
Yeah I would agree with you in that way, the PST is the fun purchase the DMK is the sensible option :p