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Prom and surface about noon 9-21-2021

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#1 chemman

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Posted 21 September 2021 - 11:37 PM

So I finally got around to using an old microscope camera I had lying around.  I find myself shooting at f28 with a 4x barlow on my 714mm focal length LS100MT-DS.  I really need 7.6um to get critical sampling but have not found a camera with that large of pixels.  This Optronics Quantfire 4kx4k @5fps camera has 7.4um I think. Much closer to critical sampling than the 3.8um ASI1600.   I was doing about 1 or 2 minute captures grabbing 300-500 frames.  The images really turned out pretty good.  I stacked in AS!3 and finished it off with some deconvolution and unsharp mask in IMPPG, PS to turn into a JPG at 7 quality yielding a 325Kb image.  I will compare with the shots I did using the ASI1600mm tomorrow.  But here is one I quickly processed and wanted to present.  

 

Chuck

 

 

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  • sun-avi-100ms_lapl5_ap20973-imppg.jpg

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#2 Scott Beith

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Posted 22 September 2021 - 04:50 AM

Really nice image Chuck!  The details really jump out in the expanded image.


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#3 rigel123

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Posted 22 September 2021 - 05:42 AM

That looks good Chuck!


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#4 chemman

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Posted 22 September 2021 - 08:22 AM

Thanks Scott and Warren. 

 

At 5 frames per second seems kind of slow but each capture being 60 seconds long is 300 frames. Not a lot usually happens in 60 seconds on the sun.  Surge proms seems to evolve over 10 to 30 minutes and the other interesting feature can evolve over hours. Deciding cadence for temporal resolution would be the question.  Images sure are more friendly size wise.  I got the camera years ago as a Guv'ment Surplus for about 50 bucks, so the price was right.  I think I can do a mosaic of 4 images for a full disk. The full disk would be loaded with detail. I could probably get a full disk with no barlow but then that will throw off critical sampling to 1.9um, so 7.4um isn't so good for that focal length.  The good thing is I can use a 2X Barlow and get a full disk on the ASI1600's 3.8um.  

 

Chuck



#5 chemman

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Posted 22 September 2021 - 09:12 AM

I don't think I can get a 4 panel mosaic, just shy.  

 

Chuck

 

 

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  • sun-avi-100ms-lowerL_lapl5_ap34049-imppg.jpg

Edited by chemman, 22 September 2021 - 09:13 AM.

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#6 chemman

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Posted 22 September 2021 - 09:14 AM

1 more from yesterday.

 

I will need to work on manual flats.  I am using an old capture software on an XP machine I remote into to run the camera and a seperate wifi remote into the on-board-computer for mount and focus controls.   

 

Chuck

Attached Thumbnails

  • sun-avi-100ms-lowerR_lapl5_ap34049-imppg.jpg

Edited by chemman, 22 September 2021 - 09:19 AM.

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#7 PhotonJohn

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Posted 22 September 2021 - 08:13 PM

Great grabs Chuck.  Excellent processing.


Edited by PhotonJohn, 22 September 2021 - 08:14 PM.

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#8 tholan

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Posted 24 September 2021 - 08:20 AM

Superb!




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