Nice Doug, I think you did a great job with the dust detail & balance.
Thanks David
Quote:
Originally Posted by strongmanmike
I agree with Dave, nicely put together.
I hear you about meridian flips...always think twice when I know I should do it.....having a PME would be handy on these occassions
Mike
Thanks Mike, MF's are the pitts to get right. At least with CCDStack it is possible to put the flipped image together without to much difficulty. Easier to wait or do an image over a couple of nights
Quote:
Originally Posted by CoolhandJo
Superb! Colour sharpness framing and detail! What more can you ask for?
Thanks Paul.
Quote:
Originally Posted by TheDecepticon
Gee, Doug, I think it is pretty good! Good amount of reflection neb and nice size.
Stuff the gem flip Doug, especially when you fill the time in with a great result like this.
Excellent colour and rendition of this favourite to everyone.
Stuff the gem flip Doug, especially when you fill the time in with a great result like this.
Excellent colour and rendition of this favourite to everyone.
Rich
Thanks Rich. It's always interesting to just profcess again from the bottom up and see what the end result is second time around.
Nothing much to say except that's a very nice Trifid.
Cheers
Steve
Thanks Steve, I must redo this target but with 10 minute subs instead of these 5 minute subs and see if I can capture a bit more of the reflection nebula.
Maaate!!!
The high res version is absolutely awesome with a lot of 3D in it.
Well done and you didn't destroy it in photoshop at all (except for the first low res pic with too much sharpening ).
Yep having a PME means you can accurately do a meridian flip and only lose a couple of pixels at the edges of the image.
That said, this is quite a nice version of the trifid. Good colours and quite smooth processing.
Just one question though. Why do you have round stars in the top left of the image and all the way around in the other corners the stars have some elongation? Are you using a reducer or flattner? Does the QHY9 have a tilt problem? I see this a lot with images taken with these cameras and wonder is the sensors are not square to the line. It is a minor thing but still getting round stars is the goal of most astorphotographers I would think. Your thoughts Doug?
Maaate!!!
The high res version is absolutely awesome with a lot of 3D in it.
Well done and you didn't destroy it in photoshop at all (except for the first low res pic with too much sharpening ).
Thanks Martin, The high res shows all the good bits of the image but it also shows up all that is bad about it as well.
Yep having a PME means you can accurately do a meridian flip and only lose a couple of pixels at the edges of the image.
That said, this is quite a nice version of the trifid. Good colours and quite smooth processing.
Just one question though. Why do you have round stars in the top left of the image and all the way around in the other corners the stars have some elongation? Are you using a reducer or flattner? Does the QHY9 have a tilt problem? I see this a lot with images taken with these cameras and wonder is the sensors are not square to the line. It is a minor thing but still getting round stars is the goal of most astorphotographers I would think. Your thoughts Doug?
Thanks Paul, an interesting question indeed. One that I haven't really spent a lot of time investigating as yet. I haven't had enough sky to waist tracking it down at the moment but I will say I am inclined to think it is a bit of sag somewhere in the imaging train or focuser somewhere.
I have run a dial guage accross the CCD itself and it seems very close to perfect.
I have added a couple of CCDInspector curvature maps frtom this image and the M17 image which does seem to indicate some inconsistancy in the imaging train somewhere.
Both these images were taken within a couple of days of each other without making any adjustments to the camera or imaging train but just taken at different levels of the sky and different times.
This is something for me to chase up when time allows but with a holiday coming and little chance of clear skies between now and going away I just can't see very much happening soon.
The first image is this image and the second is of M17.
Hmm, looks like a little sag somewhere, but always the question is finding out where. Not that I pay much attention to CCDinspector. I find it often can give inconsistent readings. The second reading for M17 shows what I would say as being near perfect. Maybe just chase up the subs Doug. I know that sometimes when stacking I get some slight elongation from the rotation of the sub, because CCDstack thinks it needs to be rotated just a little, which is completely wrong.
Just checking on your M17, the stars are definitely a nicer shape, so maybe a stacking issue or some slop somewhere in the imageing train. Is everything screw fixed? I noticed that once I went to screw fixing all the way along my stars really improved a lot.
Anyway just teething problems really. Still a nice image all the same Doug.
..having a PME would be handy on these occassions 
).
