Log in

View Full Version here: : Adding to M42

PeterEde
19-09-2014, 05:31 AM
Early morning. Better alignment 16 shots total 26 min. Exp length between 60 to 120 sec
Also longer processing. Tried a better colour balance than the last
New
https://farm6.staticflickr.com/5560/15257783236_b1f321ac00_b.jpg (https://flic.kr/p/pfh8od)
M42-Orion (https://flic.kr/p/pfh8od) by Peter Ede (https://www.flickr.com/people/74281873@N00/), on Flickr

Old
https://farm6.staticflickr.com/5565/15074803270_b787b5e338_b.jpg (https://flic.kr/p/oY7iPd)
M42-Orion (https://flic.kr/p/oY7iPd) by Peter Ede (https://www.flickr.com/people/74281873@N00/), on Flickr
raymo
19-09-2014, 12:19 PM
Much prefer the old one Peter, the blue gradient has overpowered everything, washing out the red in the nebula. Just my opinion.
raymo
PeterEde
19-09-2014, 02:23 PM
I'll look at reprocessing. Fair bit of colour balancing to try negate anything overpowering. There's more nebula in this than the blacker process. Maybe crank up the reds a little.
But I'll probably do another hour on it tomorrow morning
cometcatcher
19-09-2014, 02:34 PM
Definitely more data in the new one, it's smoother. But yeah as Ray mentioned the gradient and colour needs some work. Nice shot though.
PeterEde
19-09-2014, 03:58 PM
I've seen discussion before re colour of night sky.
Is it black, dark grey or in this case a shade of dark blue?
Preference here is for black I guess.
raymo
19-09-2014, 04:23 PM
The consensus seems to be a very very dark blue that pretty much looks black, unless looked at alongside a picture that actually is black, when the difference can be seen.
raymo
cometcatcher
19-09-2014, 07:10 PM
Personally, for most DSO's I prefer the background to be colour neutral but not black clipped. It depends on the subject matter also. Comets tend to be imaged with lighter backgrounds since they have such delicate tenuous tail structure.
LightningNZ
20-09-2014, 03:39 PM
I'm with Kevin. I go for a roughly grey background with a mean of around 20/65535 levels (16 bit). The variance of the background will be around 10-15 levels generally with good data.

Photon signals are Poisson distributed - there is no such thing as a black background - so to making the background black is not only jarring to look at, it's also technically incorrect.