So, think this needs more work but i'm out of practice, I think there is more data to be pulled out yet and some of the colours are a bit off. But it's a a start and my first in way too long so might take me a few tries :cheesy:
Taken from Mark's the other week
(http://farm8.staticflickr.com/7323/9791370334_de0a7a8827_c.jpg)
Big one here: http://farm8.staticflickr.com/7323/9791370334_5d861f1e26_o.jpg (http://farm8.staticflickr.com/7323/9791370334_5d861f1e26_o.jpg)
Jon
That's a great result Jon. You must be well pleased with that great looking Veil.
There's lots of stars there!
What scope, flatterner, filters and camera did you use? Exposure times?
Mark
Thanks Mark, although I'm pretty sure there is too much green/cyan where it should be more blue. Thought it wasn't too bad last night but with fresh eyes this morning I can see it's not as close as I first thought!
Thanks for pointing me in the right way with the setfindstar command, you can see now why Iris was having issues with it.... ;)
40 x 300 sec @ 800iso
SW Equinox 80
Televue field flattened
Modified Canon 450D
CLS Filter
NEQ6
QHY5 on SW Startravel 80
Captured with APT
Stacked and processed in Iris and PS CS5
The CLS filter always gives a colour cast to stars.
The oiii wavelength falls in the blue/green overlap of the Canon RGB matrix. My old 300D used to present it as blue but the 350D and subsequent Canons present it as greeny blue. I think the passbands were altered between the 2 models.
You can achieve a good compromise by boosting the B-channel.