Oculars Plugin: Deselecting Lens

[David Ehman]

Version 25.3.0 (64-bit)
Based on Qt 6.8.3
Running on Operating System Windows 11 Version 24H2

I am learning how to use this plugin to preview objects:Just playing with it on a cloudy day.

Sequence of events: Viewing Saturn, I picked the Plossl 26mm Ocular on a Celestron C8. That was fine. I then chose the Barlow 2x lens by double-clicking on it. The display updated just fine. 

But I don't know how to "unapply" the Barlow. Deleting it did "unapply" but I suspect that there's a smarter way.

[Georg Zotti]

Do you see the top-right Oculars menu? The lowest part should be the section controlling the extender/compressor lenses. Rotate through all lenses until there is "none" active.

[DL Ehman]

Thanks, Georg.

I brought up the Oculars configuration window by clicking on the 'wrench" in the screen's upper right corner. There were three entries under lenses: Barlow 2, Barlow 3 and Reducer. Double clicking any one invoked it and it showed in the Oculars drop-down in the top right with its corresponding Multiplicity. I tried each one. To remove its effect, I tried double clicking in a blank spot in the Lenses configuration pane. I tried double clicking on the lens in the top right drop down, but I couldn't figure out how to rotate lenses until there was "none".

 I just ended up deleting all lenses from the Oculars Configuration window. I don't have any Barlows.  If I ever need one, I'll just add it back in. As I say, I was really just playing to get a feel for how the preview works. Not critical at all.

Dave Ehman

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[Georg Zotti]

Still, the designed way to operate the elements once the instruments have been entered in the dialog is to just select telescope/eyepiece/lens combinations with the arrow keys.

 

[Georg Zotti]

If you happen to not see the arrow buttons, three years ago we had an issue: https://github.com/Stellarium/stellarium/wiki/Common-Problems-for-the-current-version#problems-with-the-oculars-plugin 

[David Ehman]

Thanks, Georg! That fixed it. Arrow_scale was set to 0.

Many, many thanks.