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Jan 18-19, 2019 Prominences

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#1 sushi1128

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Posted 19 January 2019 - 05:21 AM

Jan 19, 2019 Prominences

 

 

46073656484_2bbf2c2751_b.jpgCapture 14_35_16_g4_ap516_Drizzle30 bw by Mike Enage, on Flickr

 

39833220773_f3eb696018_b.jpgCapture 14_44_35_g4_ap465_Drizzle30 bw by Mike Enage, on Flickr

 

39833193273_df01bafc77_b.jpgCapture 14_52_42_g4_ap1260_Drizzle30 bw by Mike Enage, on Flickr

 

46746006292_3fd6ca3cd0_b.jpgCapture 14_45_36_g4_ap1123_Drizzle30 bw by Mike Enage, on Flickr

 

46745999602_2203391bb3_b.jpgCapture 14_46_10_g4_ap1885_Drizzle30 bw by Mike Enage, on Flickr

 

31856870177_9bbd1e9d13_b.jpgCapture 14_45_36_g4_ap1123_Drizzle30 color by Mike Enage, on Flickr

 

31856851917_d88b3da410_b.jpgCapture 14_46_10_g4_ap1885_Drizzle30 color by Mike Enage, on Flickr

 

46798613471_b9ede41c92_b.jpgCapture 14_40_12_g4_ap2782_Drizzle30 bw by Mike Enage, on Flickr

 

31856899647_7189802879_b.jpgCapture 14_32_42_g4_ap2602_Drizzle30 bw by Mike Enage, on Flickr


Edited by sushi1128, 19 January 2019 - 11:31 AM.

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#2 sushi1128

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Posted 19 January 2019 - 05:23 AM

Jan 18, 2019 Prominences

 

32922866948_91b75d5b50_b.jpgCapture 14_20_20_g4_ap2556_Drizzle30 color by Mike Enage, on Flickr

 

46073677684_4f86533283_b.jpgCapture 14_20_20_g4_ap2556_Drizzle30 bw2 by Mike Enage, on Flickr

 

32922874428_543bb1fe32_b.jpgCapture 14_16_03_g4_ap2038_Drizzle30 bw by Mike Enage, on Flickr


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#3 BQ Octantis

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Posted 19 January 2019 - 05:57 AM

Beautiful!

 

BQ


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#4 RickV

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Posted 19 January 2019 - 06:38 AM

Lovely set of images Mike!  Those proms are growing... getting more interesting.

Mike, I love your low-noise images... so sharp too.

 

Best,

Rick


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#5 MalVeauX

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Posted 19 January 2019 - 07:34 AM

Nice proms Mike!

 

Very best,


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#6 PETER DREW

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Posted 19 January 2019 - 08:03 AM

Thanks for the fine images. Foggy here!


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#7 hopskipson

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Posted 19 January 2019 - 08:27 AM

Very nice details, you must have some excellent seeing!


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#8 tholan

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Posted 19 January 2019 - 08:49 AM

Very nice.


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#9 sushi1128

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Posted 19 January 2019 - 12:01 PM



Very nice details, you must have some excellent seeing!

 

thanks ! James

Not really very good seeing. I think lowering the percentage of  images stacked so that I get (or aim to get)  ~70-75% quality works well for me . Usually , I get to stack  between 5-15% only (and i only get 60% quality due to seeing). The best of the bunch was image#1 in which i stacked 7% (the others were worse off). In truth, I, too, was surprised with the result smile.gif

 

Capture_zpsdvhgghso.jpg

 

 

 

Thank you for the warm comments ! ALL smile.gif


Edited by sushi1128, 19 January 2019 - 12:13 PM.

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#10 MAURITS

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Posted 19 January 2019 - 03:44 PM

Nice captures Mike ...


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#11 echobeach

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Posted 19 January 2019 - 04:35 PM

thanks ! James

Not really very good seeing. I think lowering the percentage of  images stacked so that I get (or aim to get)  ~70-75% quality works well for me . Usually , I get to stack  between 5-15% only (and i only get 60% quality due to seeing). The best of the bunch was image#1 in which i stacked 7% (the others were worse off). In truth, I, too, was surprised with the result smile.gif

 

Capture_zpsdvhgghso.jpg

 

 

 

Thank you for the warm comments ! ALL smile.gif

Great pictures  I captured the same proms on a Lunt LS60THa BF600 with a 2 x Barlow and a ASI120mm-s. My Images do not have as much detail as yours so I replicated your stacking settings, an improvement but not as detailed. Could you tell me what equipment you are Imaging with?. I'm located in Brisbane Australia in the midst of a heatwave. The outside Temperature was around 33 degrees Celsius so that may be a factor. 

 

Cheers Martin

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  • Sun_102847_g4_ap1175no2ps.jpg

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#12 rigel123

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Posted 19 January 2019 - 05:43 PM

Nice ones Mike!  I haven't seen the sun in so long I forget what it looks like!


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#13 sushi1128

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Posted 19 January 2019 - 06:04 PM

Great pictures  I captured the same proms on a Lunt LS60THa BF600 with a 2 x Barlow and a ASI120mm-s. My Images do not have as much detail as yours so I replicated your stacking settings, an improvement but not as detailed. Could you tell me what equipment you are Imaging with?. I'm located in Brisbane Australia in the midst of a heatwave. The outside Temperature was around 33 degrees Celsius so that may be a factor. 

 

Cheers Martin

 

 

Hi Martin,

 

It was about 32-33C in Manila, too, at the time I shot these. While we have the same camera, I used a TMB92 with a daystar Quark to complete my imaging train. Seeing, aperture, and deconvolution process could also  account for the marked difference.

 

-Mike


Edited by sushi1128, 19 January 2019 - 06:27 PM.


#14 hopskipson

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Posted 19 January 2019 - 07:14 PM

thanks ! James

Not really very good seeing. I think lowering the percentage of  images stacked so that I get (or aim to get)  ~70-75% quality works well for me . Usually , I get to stack  between 5-15% only (and i only get 60% quality due to seeing). The best of the bunch was image#1 in which i stacked 7% (the others were worse off). In truth, I, too, was surprised with the result smile.gif

 

Capture_zpsdvhgghso.jpg

 

 

 

Thank you for the warm comments ! ALL smile.gif

I guess I have to try this.  I usually go with 10-20% frames stacked.  I find with lower %'s that I have way too much noise and when I use wavelets in Registax I get all kinds of weird artifacts.


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#15 RickV

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Posted 19 January 2019 - 09:44 PM

Hmm... 7% of 622 frames is only 44 frames!

I would have expected the stacked image, even after processing, to be either quite noisy via sharpening or blurred via noise reduction.  That certainly would have been the case with my ZWO ASI 178MM.

 

I can only assume therefore that either:

a) you had extra-ordinary seeing ... but you said, "Not really very good seeing", or

b) your camera ASI120mm-s has much lower noise than my ZWO ASI 178MM

 

???

Best,

Rick


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#16 echobeach

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Posted 20 January 2019 - 03:15 AM

Hi Martin,

 

It was about 32-33C in Manila, too, at the time I shot these. While we have the same camera, I used a TMB92 with a daystar Quark to complete my imaging train. Seeing, aperture, and deconvolution process could also  account for the marked difference.

 

-Mike

Hi Mike thank you four your reply,I only started Imaging in H-alpha last month so I'm still learning the art of solar imaging. Here is a prom from today which almost looks 3D

 

Cheers Martin

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  • 11_07_20_g4_ap177.jpg

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#17 sushi1128

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Posted 20 January 2019 - 03:25 AM

James, Martin, and Rick,

 

 

While it would be tempting to stack more, thereby averaging lower quality frames which in turn would require more sharpening (which in turn results to more noise),  logic dictates that these problems in stacking and deconvolution be tackled separately and efficiently. Let's try to get the best stacked  quality, first, and then worry about sharpening noise later.    That said, I do not have nor do I claim to have the magic bullet for either. I can only offer my process with the so so results above.

 

 

On stacking :

Generally,  imaging in  higher magnifications would be more affected by poor seeing and undulations. I suspect the above value of 7% stacked images may not work for you since you guys have wider FOVs than I. 20-30%  (or more) would be good for that 1000 EFL (500mm x2 barlow compared to my 505mm X4.3 telecentric barlow of the Quark + very small chip of ASI120).  Occasionally, AutoStakkert would produce unsightly stacking artifacts which would not be present if you used Registax, so try both.

 

On deconvolution: (The  wavelet values below presumes a 3X drizzle in AutosStakkert and 2X drizzle in Registax6)

If the values prove too much, move the slider (yellow arrow) accordingly. If the slider is at  minimum, but still too coarse, you can turn off the layer by ticking its box (Red arrow). Repeat process on next layer below. Again, this is my wavelet recipe for my setup so you must make adjustments for your own gear. Mottling noise, which would show up in the zoom panel, should not have hard edges. Otherwise, dial back your wavelets

I've used both IMPPG and Registax6. The jury is still out on these two, but I find Registax' wavelet to be superior. However, for my image #1 above, I used PS cc's USM with a value of 400 and a radius of 8. No further sharpening or noise reduction applied. I find PS's USM the best of the lot but I do use the other two when USM isn't as effective. 

 

BTW: all the above are what I use for Proms only. Surface exposures require different values in aggresiveness.

 

if you wish, you could email me a stacked TIF. maybe, together we can find a nice balance of detail sharpness and noise smile.gif

 

YMMV

 

cheers,

Mike

 

Capture2_zpsdifufulb.jpg


Edited by sushi1128, 20 January 2019 - 04:55 AM.


#18 sushi1128

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Posted 20 January 2019 - 03:35 AM

Hi Mike thank you four your reply,I only started Imaging in H-alpha last month so I'm still learning the art of solar imaging. Here is a prom from today which almost looks 3D

 

Cheers Martin

Looks great and great details ! 


Edited by sushi1128, 20 January 2019 - 03:41 AM.

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#19 RickV

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Posted 20 January 2019 - 08:04 AM

Thanks for the explanation and pointers Mike!

Alas, I feel that I am beyond help... bawling.gif

 

Or it could be that my imaging the sun at just 18 degrees above the horizon poses special challenges.

 

Best,

Rick


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#20 rigel123

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Posted 20 January 2019 - 04:00 PM

Thanks for the explanation and pointers Mike!

Alas, I feel that I am beyond help... bawling.gif

 

Or it could be that my imaging the sun at just 18 degrees above the horizon poses special challenges.

 

Best,

Rick

Definitely a challenge at that elevation!



#21 Scruffy-the-janitor

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Posted 20 January 2019 - 08:16 PM

thanks ! James

Not really very good seeing. I think lowering the percentage of  images stacked so that I get (or aim to get)  ~70-75% quality works well for me . Usually , I get to stack  between 5-15% only (and i only get 60% quality due to seeing). The best of the bunch was image#1 in which i stacked 7% (the others were worse off). In truth, I, too, was surprised with the result smile.gif

 

Capture_zpsdvhgghso.jpg

 

 

 

Thank you for the warm comments ! ALL smile.gif

 

 

Can you explain the above graph a bit and how it relates to "frame % to stack" I use Autostakkert as well and just kind of go with my gut and no real understanding of what I'm seeing. So if I could understand whats going on I bet it would help me significantly. 



#22 sushi1128

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Posted 21 January 2019 - 01:53 AM



Can you explain the above graph a bit and how it relates to "frame % to stack" I use Autostakkert as well and just kind of go with my gut and no real understanding of what I'm seeing. So if I could understand whats going on I bet it would help me significantly. 

 

 

In the Graph below, I have labeled the X and Y axes.

Interpretation of Quality graph : In order to get the  top 75%  quality frames, we should only stack about 30% from total captured (red arrow). 

if you stack 50% of the frames, you'll be averaging the ~70% best quality frames

 

 

 

(this is a graph from an almost full disk moon capture)

 

Capture3_zpsoelka8l4.jpg


Edited by sushi1128, 21 January 2019 - 02:00 AM.

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