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My First 'ok' image

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#1 CrossAerialPhotography

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Posted 11 January 2019 - 09:14 PM

Here is the first image that I dont completely hate. I mean, it's not good by any means, but it's ok. 

 

So we had some dark nights and I went out over 3 nights to image. This was my second time at imaging for long periods of time, over multiple nights, and doing longer subs. 

 

Using my:

WO ED80 with a .8 reducer and flattener

D5300

AVX

 

I collected

 

36x120" ISO200
38x20" ISO200
8x240" ISO200
19x300" ISO200

 

Now, the 20" subs are crazy noisy. My master light has a ton of noise even with darks. It was also very cold that night (40F). The 300" look great and have very reasonable noise. 

 

So I know that my processing in Pix probably has a lot to be desired. I ran into issues processing the noise. All the traditional means caused the nebula to look really strange. Like I could get the noise wrangled, but then the image would look strange. This was using very little NR (Like only 1 layer with only .3 amount, 1 iterations. Something was up).

 

Luckily, my ASI1600MM Pro will come in tomorrow! This will allow for better darks as well as, better flats. All around, better image. 

 

If I could wrangle the noise, and bring out some more sharpness, the image wouldnt be too bad. So attached is the low res, then Ill link Astrobin. I can send the data if anyone wants it. 

Render 2-2.jpg
 
get.jpg?insecure
 
I know it's not great. This is only my 4th DS image (did a lot of widefield before going deep) but I want to hopefully get a Orion photo that is print worthy because it was this photo that go me into this hobby. 
 
One good thing is that I did learn that I can get around 400" off of my AVX before I get streaking. So thats good for these narrow band filters I got. 

 

 

Attached Thumbnails

  • Render 2-2.jpg

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#2 bobzeq25

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Posted 11 January 2019 - 11:01 PM

Way, way, _way_ better than OK.  Especially with that equipment.  You should be very proud of that.

 

Minor suggestions.  Did you use SCNR to get rid of excess green?  I find ACDNR to be the easiest for noise reduction.  But that's not very noisy.


Edited by bobzeq25, 11 January 2019 - 11:06 PM.

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#3 CrossAerialPhotography

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Posted 11 January 2019 - 11:30 PM

Way, way, _way_ better than OK.  Especially with that equipment.  You should be very proud of that.

 

Minor suggestions.  Did you use SCNR to get rid of excess green?  I find ACDNR to be the easiest for noise reduction.  But that's not very noisy.

If you say so. I was really going for that '3d' look and wanted low noise. Despite my best efforts, it still reared its ugly head in. As for excess green, I really didnt have anything that was very green in my data so I never had to remove it. Just some light purple haze that I used DBE to remove. 



#4 Astrola72

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Posted 11 January 2019 - 11:52 PM

First, I think your image is great. It took me way more than 4 tries to get anywhere near that. Having said that, I think Bob was right about applying SCNR. This is your low-res thumbnail with a quick SCNR applied. I think the dust clouds look better. Of course, that's subjective.

 

test_orion_scnr.jpg

 

Joe


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#5 rockstarbill

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Posted 12 January 2019 - 04:24 AM

Great first image. I cannot say the same for my first image. grin.gif  I can offer a few things...

 

1. You really need to dither.

2. You have coma in all 4 corners that is pointing inward, which would leave me to believe that you should play with the spacing a bit.

3. Focus looks to also be off, how did you focus here? 

 

All in all, this is pretty good for a first stab. waytogo.gif



#6 CrossAerialPhotography

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Posted 12 January 2019 - 02:45 PM



Great first image. I cannot say the same for my first image. grin.gif  I can offer a few things...

 

1. You really need to dither.

2. You have coma in all 4 corners that is pointing inward, which would leave me to believe that you should play with the spacing a bit.

3. Focus looks to also be off, how did you focus here? 

 

All in all, this is pretty good for a first stab. waytogo.gif

I thought that was automatically done with PHD2? Is it not? 

I have the spacing right at 55mm, which is what it recommended +-4mm. This is for the TRF2008

 

I did focus with a Bat mask every 30-45min and made sure it was spot on. 

 

Below are all of my master images for each sub length. You can see the noise is really bad in the short ones. 

 

31775541237_9606f06d67_b.jpg300s master CN by Noah Lambert, on Flickr

 

31775533437_bcbe9779c7_b.jpg240s master CN by Noah Lambert, on Flickr

 

32841978868_057020340f_b.jpg120s master CN by Noah Lambert, on Flickr

 

45992326464_5377a17cb6_b.jpg20s master CN by Noah Lambert, on Flickr



#7 bobzeq25

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Posted 16 January 2019 - 03:36 PM

I thought that was automatically done with PHD2? Is it not? 

I have the spacing right at 55mm, which is what it recommended +-4mm. This is for the TRF2008

 

I did focus with a Bat mask every 30-45min and made sure it was spot on. 

 

Below are all of my master images for each sub length. You can see the noise is really bad in the short ones. 

 

31775541237_9606f06d67_b.jpg300s master CN by Noah Lambert, on Flickr

 

31775533437_bcbe9779c7_b.jpg240s master CN by Noah Lambert, on Flickr

 

32841978868_057020340f_b.jpg120s master CN by Noah Lambert, on Flickr

 

45992326464_5377a17cb6_b.jpg20s master CN by Noah Lambert, on Flickr

You need to actively engage dithering.

 

The noise in the short exposures is completely expected.  You might want to read at least the first part of this, which talks in depth about the issue.  That part has nothing to do with PixInsight.

 

https://jonrista.com...duction-part-1/




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