Altocumulus

I opened the final four - my immediate thought is whether there's enough contrast for the stitching program to latch onto. Perhaps someone else has managed.....

It's possible - the stitching would need some similarity between the images - I assume you had a generous overlap....

Over how many minutes are these covering? I'm wondering if the sun was perhaps changing too much between the first and the last?

^^^What they said

Try this one - I'm still struggling a bit with the tone curve, especially the way this tutorial suggests moving points...

I'm going to confess I'm still somewhat baffled. Left bottom = dark with white to the right - input Left bottom = dark with white to the top - output. Nigella, did you lift the tone curve at each point in order to achieve the necessary adjustment. I'm asking because a couple of youtube tutorials show the user moving tone points to the left. What's the underlying rationale behind that? In my limited experiments I end up with peculiarities creeping in.

Seconded.

Damn good in what you did manage. I have snow if anyone is interested.....No?!

'tis now raining. I'll send it your way

Very nice. I have cloud, here, if you'd like it early Not seen much, if any rain! Cold front expected through us this PM but forecast remains cloudy afterwards.....

Thanks Nigella - that would point to mine being 'made up' through Luminar. I've since tried to see if I can see any using ImPGG, but unsuccessful. I messed up on Ha on the same day, so good to see the comparison. ClearOutside gives me orange/red conditions for the next 6 days; but we'll see.....

Stunning.

Double checked - that's the version I'm using. Great software, by the way, even if it does confuse my old brain cells.....

Thanks Freddie - I often find some settings doing things unexpectedly. I watched a u-tube tutorial earlier this morning in which points were created on the curve and then moved to the left, rather than a straight upward lift. It's all very clever

You have sun !

Looking, again, at the original in impgg, I get the impression those proms are not real - perhaps something that crept in as I looked through Luminar settings!

Thanks Nigella. As I said before , mysteries !

For some reason I thought they'd be slightly different - though harder to see in Ca-K.

Can you pinpoint which parts of the tone curve affect which parts of the image; other than black/left - white/right.

...

Holy F!

Aye - but Gong is Ha....

Ca-K AS3, 15 from 201 frames Impgg Luminar3 WO 102, Lunt Ca-K module, Altair 178. Need to sort out a more sensible way to decide if the prominences are 'real' or artifacts....

Brilliant! Spent an exasperating morning, then gave up, as everything that could go wrong did.....Might have missed my chance for the rest of this week if the forecast turns out correct....

Indeed, Nice.