Jump to content

NLCbanner2024.jpg.2478be509670e60c2d6efd04834b8b47.jpg

24 Panel Mosaic

don4l

By don4l
in Imaging - Lunar

 Share

Recommended Posts

don4l

don4l

Posted
Posted (edited)

This is my third mosaic (5th attempt - first two had gaping holes), and things are definitely getting easier with practice.  I discovered the "take a snapshot" button in Sharpcap and thought that I could build up a quick mosaic as I went along.  This turned out to be much easier to do than I thought.  The workflow was 1) take snapshot, 2)start capture 3)Open snapshot as new layer in Gimp and quickly line it up, 4)move mount and repeat.

This resulted in a mosaic that needed 24 frames as opposed to the 32 that my last mosaic needed.  I think that I could get this down even further if I try.

One weird thing is that I had to refocus during the capture.  I prefer to leave everything the same because it greatly reduces the processing.  I haven't had to adjust the brightness .

The image was taken through a Tal200k, ASI120mc on an EQ6.  Acquisition was with Sharpcak.  Stacking and wavelets in Registax6.  Mosaic assembly in Gimp.

Comments and suggestions very welcome.  The suggestions that I got on the previous images have been brilliant and really helped. 

I still don't understand what the Gain and Brightness settings really do.  I think that it would be good to capture some of the "Earthshine", but I cannot see any hint of the unlit part of the Moon even when I change the settings.

Click the image for full size (18Mb).

moon060320b.jpg

Edited by don4l
  • Like 15
Link to comment
Share on other sites
geoflewis

geoflewis

Posted
Posted

Great job Donal,

You're definitely getting the process nailed down and the final result is excellent. Building the mosaic on the fly with quick screen captures is a great way to go. Interesting that you took Autostakkert out of the mix as in my experience that generally produces a better stack than Registax, so what was your thinking there?

At full resolution I can see one fairly long horizontal seam to the north of Mare Serenitatis heading towards Plato, i.e. towards the bottom of your image as you've presented it, so don't know if you had a small capture miss there, or whether it's a blending issue that you can fix. Other than that very minor blemish this is a superb image, very well done :thumbright:

  • Thanks 1
Link to comment
Share on other sites
don4l

don4l

Posted
  • Author
Posted (edited)
13 hours ago, geoflewis said:

Great job Donal,

You're definitely getting the process nailed down and the final result is excellent. Building the mosaic on the fly with quick screen captures is a great way to go. Interesting that you took Autostakkert out of the mix as in my experience that generally produces a better stack than Registax, so what was your thinking there?

At full resolution I can see one fairly long horizontal seam to the north of Mare Serenitatis heading towards Plato, i.e. towards the bottom of your image as you've presented it, so don't know if you had a small capture miss there, or whether it's a blending issue that you can fix. Other than that very minor blemish this is a superb image, very well done :thumbright:

I didn't consciously take AutoStakkert out.  I processed a single AVI in Registax and was impressed with the result, so I just carried on with the rest.  Tomorrow, I'll do some experiments to see what produces the best result.  I'm also going to play with the number of frames used in each panel.

I've cropped a frame to remove a horizantal line which was at the bottom edge of one of the frames.   (There isn't any "blending" as such. The layers are just on top of each other.)

I *think* that I've fixed it in this???

moon060320c.jpg

Edited by don4l
  • Like 2
Link to comment
Share on other sites
Altocumulus

Altocumulus

Posted
Posted
14 hours ago, CraigT82 said:

Superb! Have you tried msice for the mosaic stitching? So easy to use and all automated. Think of gain as ISO, increases sensitivity but with more noise

May I ask a supplementary question here - if Gain ~ ISO, what's Offset?

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.