A Crescent in Twilight

[DaveS]

Not looking for praise on this, it's just the first image I've got from my 130 f/7 Photoline apo and Trius 694 since moving to Dorset, and probably for a good year

One hour only of HII in 10 min subs through a 3 nm Astrodon. Calibration with Darks only froman old library, no flats or bias yet, they will come in due course.

Processing Sigma Add stacking in AA5, then just a few rounds of histogram stretching.

C&C welcome, as always. This will be the basis of a NHO image, as being a wolf-Rayet object, I expect [NII] to be quite strong.

[Davey-T]

Good to see you're up and running with relatively few problems Dave, it seems to me that the more expensive the mount the more pernickety  they are 

Dave

[DaveS]

Thanks Dave, yes it has been a long slog but at last I'm imaging again with the big rig.

When DDM mounts work, they just *work*, but if they're having a bad day (Or night) then you can be tearing your hair out.

Something for me to look at, The Histo said 12 bit until I did a stretch, odd, as the Trius is a 16 bit camera, and I don't recall seeing 12 bit before.

[DaveS]

One thing I'll add.

Even though it's only "nautical dark", and taken on the shortest night of the year, it was *still* darker than anything I'd had in London since I don't know when, in fact, if the change in streetlights had given me a sky like that, at *any* time of the year then I probably wouldn't have moved.

Mind you, I'm glad I did as I get much more than just dark nights 😃.

[DaveS]

I had another go, stacking with Bias as well as Dark, then giving some pretty extreme processing, DDP and three rounds of Histo Stretch followed by a bit of LPF to knock the noise down a bit. This was just to see what was lurking in the background.

It doesn't bear too close scrutiny, and the final image won't have been subjected to anything like as severe a mauling.