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Old 01-08-2020, 11:27 PM
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My best Saturn shot so far

My best image of Saturn so far. 01-08-2020 at 9:30pm.

Meade LX90 ACF 8" F10 SCT at prime focus, ZWO ASI 183mm Pro with Svbony LRGB filters, 32,000 frames stacked. Processed in PIPP, Registax and Photoshop for levels.
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Click for full-size image (Saturn_Moons.jpg)
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  #2  
Old 02-08-2020, 01:36 PM
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xa-coupe (Jeff)
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I never tire of seeing pics of Saturn. Even so, this one is up there with the best I've seen on here.
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Old 04-08-2020, 08:05 AM
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Thanks Jeff.
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Old 06-08-2020, 08:28 PM
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Good image Kevin
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Old 08-08-2020, 08:38 PM
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Thanks Troy. Cloudy again now, but hopefully it will clear soon for more planet fun.
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Old 08-08-2020, 08:52 PM
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Nice 1 Kev

Best
JA
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Old 12-08-2020, 12:06 AM
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Thanks JA!
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Old 12-08-2020, 06:21 AM
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Nice image of Saturn, it never fails to impress.

I notice you didn't mention AS!3 in your software list, you don't use it? From what I've heard, it is far superior than Registax for stacking. Also, no Barlow?

Andrew
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Old 12-08-2020, 07:27 AM
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Hi Andrew, no I'm still trying to figure out how to use Autostack program thingy.

No, no barlow. The ASI 183 has tiny 2.4um pixels and it helps keep the frame rate up if I don't use one.
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Old 12-08-2020, 08:09 AM
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Quote:
Originally Posted by cometcatcher View Post
Hi Andrew, no I'm still trying to figure out how to use Autostack program thingy.

No, no barlow. The ASI 183 has tiny 2.4um pixels and it helps keep the frame rate up if I don't use one.
IMHO, using AS!3 is the easiest part of this whole AP process. Just drag the video onto the screen, click the "Analyse" button, auto choose the alignment points with a size that gives me around 100 APs, stack 3000, 5000, 7500 and 10000 frames, make sure 3x drizzle is on and press "Go". Easy . Attached is a screen grab of my settings FYI.

Understand with the 183's pixel size, optimal focal ratio for that camera is around f/12, so all good

Andrew
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  #11  
Old 12-08-2020, 10:41 PM
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Quote:
Originally Posted by Tulloch View Post
make sure 3x drizzle is on...

Understand with the 183's pixel size, optimal focal ratio for that camera is around f/12, so all good

Andrew
What does the drizzle function do?
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Old 13-08-2020, 09:17 AM
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Drizzle magnifies the image by shifting pixels a little bit left/right/up/down to eek the last little bits of resolution out of the image. It increases the size of the image which I think makes it easier to post-process as you can see the effects more easily. After I do all the adjustments I want, I can then reduce the size back down (usually Jupiter I reduce by a third to get the planet size back down to captured size, Saturn I reduce by a half to show it at 50% larger than captured, Mars I show at 2x etc). Here is a long description of the process, all I know about it is that it can potentially improve my images (even if it's just a little bit, that's enough for me).
http://www.stark-labs.com/craig/reso...rizzle_API.pdf

It takes longer, both to stack and sharpen, but I have time ...

BTW, here is a video of Emil (creator of Autostakkert) describing the program and the latest version, AS!4 (not yet released).
https://www.youtube.com/watch?v=JIjXmRh1DE0

Andrew
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  #13  
Old 13-08-2020, 10:11 AM
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Do you use a subframe with the ASI183?
32000 19meg files would be a big dataset for full frame.

Terry
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  #14  
Old 14-08-2020, 04:39 PM
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saturn

bloody beautiful !!

Andrew- 5000?? 7000?? sheet man ! I have to up my game, was taking about 1000 frames and hoping for the best!!
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Old 14-08-2020, 05:29 PM
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Gotta take a lot of frames, for Jupiter I image for 3 minutes at 150 fps (=27000 frames), Saturn is 5 min at 100fps = 30000 frames. Cropped appropriately, each video is only about 4GB or so. The most recent images I took of Saturn and moons were 15GB each

Last edited by Tulloch; 14-08-2020 at 06:01 PM.
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  #16  
Old 14-08-2020, 05:39 PM
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graham.hobart (Graham stevens)
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planets

Wow! been seriously under exposing
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Old 14-08-2020, 05:41 PM
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getting 150fps !! is that easily done on firecapture at 10bits ?/ what are your settings??
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  #18  
Old 14-08-2020, 06:08 PM
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I'll reply on your posting
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Old 14-08-2020, 06:36 PM
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saturn

Thanks once again people!!
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  #20  
Old 14-08-2020, 07:12 PM
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Quote:
Originally Posted by Terry B View Post
Do you use a subframe with the ASI183?
32000 19meg files would be a big dataset for full frame.

Terry
The AVI's are shot using ROI of only 320x240 or 640x480 so not so big.

Quote:
Originally Posted by graham.hobart View Post
bloody beautiful !!

Andrew- 5000?? 7000?? sheet man ! I have to up my game, was taking about 1000 frames and hoping for the best!!
Quote:
Originally Posted by graham.hobart View Post
Thanks once again people!!
Thanks Graham. I take as many as I can before it rotates. I was getting 177fps on Jupiter earlier.
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