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Old 17-08-2009, 07:58 AM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Sydney
Posts: 22,080
Quote:
Originally Posted by DavidU View Post
Nice full contrast there Marc, did the mount cause a little egging of stars?
The final will be a corker if you can get more clean data.
excellent
Thanks David, that's the plan this week-end. Bit nervous with the mount though. Never had any problems with it in the past. Might be sticky grease with water. Cleaned and re-lubed the whole thing.

Quote:
Originally Posted by gregbradley View Post
Ooh Sensational Marc. What scope did you use?
Thanks Greg - Same old - the 5" newt.
Quote:
Originally Posted by gregbradley View Post
Stars appear very slighty oversharpened to me. I didn't really notice the stars being eggy but the slight egginess would be easily corrected by:

1. duplicate layer
2. you could upsize it 2 or 3 times if you want finer control
3. set layer to darken
4. filters/offset
5. in your case the stars are slightly oval vertically so set
vertical offset as need until stars round. You may reduce this effect
by selecting fade after you have done this and reduce to 50% etc or
go ahead and do it and then reduce the image back down to the original size. Either way you may want fine control.

You can also lasso the main object and select/inverse so only the stars outside the main object are effected.

Now when happy use flatten image to fix the effect.

Greg.
Sounds good. I'm going to try that. Should work to lessen coma too

Quote:
Originally Posted by Martin Pugh View Post
I just love pure Ha shots and this is very good indeed, but I think focus might have been off just a tad.
Should look great in colour

well done
Martin
Thanks Martin. You're right and I'm starting to get into the routine of re-checking focus now but that night I was having guiding problems and that took most of my time. One of every two subs was buggered. Of course the guiding was fine when I stayed next to the scope, only when I went to the obs to get a cuppa and come back would it misbehave.

Quote:
Originally Posted by Alchemy View Post
shows the structure quite well in Ha, might have a go at this sort of thing myself ....oneday
Thanks Clive. Yeah there's a lot of interesting stuff in that small area. That's about 2x1.5 degrees under M8. It looks very good in RGB too as some reflections nebs lie around within the Ha emission.
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