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Saturn using UV filter for the Luminance channel
Aug 14, 2022 16:49:45   #
Ballard Loc: Grass Valley, California
 
The other night I took some video of Saturn and tried an experiment to see what I would get with a 370nm UV filter. I was very surprised at how more contrast and detail it got with it than any of the other filters. The atmosphere was fairly turbulent, and Saturn never got more than 35 degrees above the horizon, so video wasn't all that great and I only stacked 10% of the frames which still worked out to ~900 frames for each filter. The first image was using standard RGB and luminance filter, the second used the UV filter in place of the Luminance filter for the luminance channel.

All images were taken with at a 4096mm focal length at F10 with a Meade LX200 Schmidt Cassegrain using a QHY 290M mono camera. The video was taken with FireCapture as .ser files. processing of the video was done with PIPP (Planetary Imaging PreProcessor and then stacked with autoStakket (64bit). Winjupos was used to de-rotate the individual stacks and combining the LRGB images. Final sharpening and color correction was done with Pixinsight.
All questions comments and suggestions are welcome.

Saturn using Luminance, Red, Green and Blue filters.
Saturn using Luminance, Red, Green and Blue filter...
(Download)

Saturn using a UV filter for the Luminance channel and the same Red, Green and Blue filters as the previous image.
Saturn using a UV filter for the Luminance channel...
(Download)

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Aug 14, 2022 17:59:45   #
Railfan_Bill Loc: "Lost Wages", Nevada
 
Wow, Ballard, you hit a bases full home run with this image. I could only try with my setup to get this high quality image. Good Show!!!

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Aug 14, 2022 18:47:35   #
PoppieJ Loc: North Georgia
 
And I was going to try and capture an image with a 900mm. Maybe I will just look at yours and wish

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Aug 14, 2022 19:33:14   #
Ballard Loc: Grass Valley, California
 
Railfan_Bill wrote:
Wow, Ballard, you hit a bases full home run with this image. I could only try with my setup to get this high quality image. Good Show!!!


Hi Railfan_Bill
Thanks for checking out the images of Saturn and for the comment.

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Aug 14, 2022 19:35:40   #
Ballard Loc: Grass Valley, California
 
PoppieJ wrote:
And I was going to try and capture an image with a 900mm. Maybe I will just look at yours and wish


Hi PoppieJ
Thanks for checking out the photos of Saturn and for the comment. 900mm is good for the moon and many deep sky objects but the planets usually require 2000mm + to capture much detail.

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Aug 14, 2022 21:01:27   #
rgrenaderphoto Loc: Hollywood, CA
 
Ballard wrote:
The other night I took some video of Saturn and tried an experiment to see what I would get with a 370nm UV filter. I was very surprised at how more contrast and detail it got with it than any of the other filters. The atmosphere was fairly turbulent, and Saturn never got more than 35 degrees above the horizon, so video wasn't all that great and I only stacked 10% of the frames which still worked out to ~900 frames for each filter. The first image was using standard RGB and luminance filter, the second used the UV filter in place of the Luminance filter for the luminance channel.

All images were taken with at a 4096mm focal length at F10 with a Meade LX200 Schmidt Cassegrain using a QHY 290M mono camera. The video was taken with FireCapture as .ser files. processing of the video was done with PIPP (Planetary Imaging PreProcessor and then stacked with autoStakket (64bit). Winjupos was used to de-rotate the individual stacks and combining the LRGB images. Final sharpening and color correction was done with Pixinsight.
All questions comments and suggestions are welcome.
The other night I took some video of Saturn and tr... (show quote)


Beautiful.

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Aug 15, 2022 03:05:24   #
Ballard Loc: Grass Valley, California
 
rgrenaderphoto wrote:
Beautiful.


Hi rgrenaderphoto
Thanks for checking out the images of Saturn and for the comment.

Reply
 
 
Aug 15, 2022 05:17:24   #
Red Sky At Night
 
Wow! Impressive!

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Aug 15, 2022 08:25:18   #
alberio Loc: Casa Grande AZ
 
Nice. Saturn is what I first saw in a 3" Sears telescope when I was 16 and it led to my astronomy addiction.

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Aug 15, 2022 11:10:38   #
bwana Loc: Bergen, Alberta, Canada
 
Ballard wrote:
The other night I took some video of Saturn and tried an experiment to see what I would get with a 370nm UV filter. I was very surprised at how more contrast and detail it got with it than any of the other filters. The atmosphere was fairly turbulent, and Saturn never got more than 35 degrees above the horizon, so video wasn't all that great and I only stacked 10% of the frames which still worked out to ~900 frames for each filter. The first image was using standard RGB and luminance filter, the second used the UV filter in place of the Luminance filter for the luminance channel.

All images were taken with at a 4096mm focal length at F10 with a Meade LX200 Schmidt Cassegrain using a QHY 290M mono camera. The video was taken with FireCapture as .ser files. processing of the video was done with PIPP (Planetary Imaging PreProcessor and then stacked with autoStakket (64bit). Winjupos was used to de-rotate the individual stacks and combining the LRGB images. Final sharpening and color correction was done with Pixinsight.
All questions comments and suggestions are welcome.
The other night I took some video of Saturn and tr... (show quote)

Very nice! I'll have to dig out my UV band pass filter.

bwa

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Aug 15, 2022 13:11:38   #
Ballard Loc: Grass Valley, California
 
Red Sky At Night wrote:
Wow! Impressive!


Hi Red Sky At Night
Thanks for checking out the images of Saturn and for the comment.

Reply
 
 
Aug 15, 2022 13:22:39   #
Ballard Loc: Grass Valley, California
 
alberio wrote:
Nice. Saturn is what I first saw in a 3" Sears telescope when I was 16 and it led to my astronomy addiction.


Hi alberio
Thanks for the comment and for viewing the images of Saturn. Looks like experimenting with some different filters paid off, I actually expected the UV filter to give a worse image than luminance since normally the red is the best, then luminance, then green then blue due to atmospheric turbulence, but this pattern didn't hold true for the UV, it was better than all the others.
I was hooked when I was just a kid in grade school but only now have the time and resources to really indulge.

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Aug 15, 2022 13:27:46   #
Ballard Loc: Grass Valley, California
 
bwana wrote:
Very nice! I'll have to dig out my UV band pass filter.

bwa


Hi bwa
Thanks for checking out the photos of Saturn and for the comment. As I mentioned to alberio I was surprised that the UV filter gave the sharpest image of all the filters since normally I found that the higher the frequency of the light the more the atmospheric turbulence gets in the way, but this pattern didn't hold true for the UV filter.

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Aug 28, 2022 16:20:51   #
thumpercat2
 
awesome!

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Aug 28, 2022 20:55:32   #
Ballard Loc: Grass Valley, California
 
thumpercat2 wrote:
awesome!


Hi thumpercat2
Thanks for checking out the photo of Saturn and for the comment. Note: a day of two after this I got a very slightly better version of Saturn where the Encke gap is just starting to be visible on the outer part of the ring system.
I posted this shot along with some shots of Jupiter at
https://www.uglyhedgehog.com/t-749309-1.html

Note: I had to add minor correction to the image of the shadow of one of Jupiter's moon on the planet which is farther down in the post.

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