Quote:
Originally Posted by marc4darkskies
I didn't see your first version but this one looks very good Greg!  The OIII is coming through reasonably well but the Ha areas seem a little pale  |
Yeah that's true. I have redone it again this morning. I also used a bit of PixInsight for HDR multiscale transform which helps retain detail in the bright areas.
Quote:
Originally Posted by atalas
A few of my thoughts that are worth nothing Greg.
Detail good.
Composition not bad....could be better.
A bad sub in there from what I'm seeing.
I don't think the colour's great but not bad.....a sign of frustrated blending to me.
Doesn't look smooth to me.....more signal needed in the background.
Dynamic range not quite right and I think Peter's brightness across the field comment is correct but I just wouldn't call It quite flat.
Hey like I said Greg my thoughts are worth nothing.
Good effort I just expect great shots from you |
Thanks Louie. Quite right. I was a little annoyed with the compensation as it really needed to go up a tad to get that round donut neb fully in the scene. Oh well.
I took the comments on board and spent some time redoing it practically from scratch (same link) with particular attention to retaining detail in the bright O111 area in the birdlike nebula.
The O111 subs had larger stars. My camera adapter is a tad thick and the other night when it was hot I discovered I ran out of rack in room on the focuser. So I have adjusted the adapter on the camera to get a tiny amount of rack in so I suspect it did not rack in using temperature compensation plus blue tends to bloat anyway.
I used a star mask to block out the blue O111 stars as they were damaging the stars anyway.
I am happy with this version and it was a good run on a new camera. The camera overall seems quite good. Its touted as the replacement for the ASI 1600. It also has a 47mp mode which I'll experiment with on a night of good seeing. I already know the RHA will handle it on a night of good seeing as I used an ASI183 with the same sized 2.3 micron pixels before.
Haven't done an image for a while and relearnt the level of care required to get a good image.
https://pbase.com/gregbradley/image/171353128/large
Greg.