Search found 46 matches

by donstim
Fri Sep 21, 2018 6:11 pm
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 3298

Re: Live Stacking Beginner help

Wow. I don't know how to express my gratitude. Thank you so much. I had just started to play with this image in GIMP as well, but was only using the brightness/contrast tool and curves and was not satisfied with my result. I had just resigned myself to studying the GIMP user manual to learn how to u...
by donstim
Fri Sep 21, 2018 1:45 am
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 3298

Re: Live Stacking Beginner help

Here are a couple of other images of M27 that I saved the same night using different black level and gamma settings. I am having trouble choosing which one is "best." I tend to like the image with the darker background, but then I'm not sure it shows as much of the fainter parts of the nebula.
by donstim
Thu Sep 20, 2018 8:31 pm
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 3298

Re: Live Stacking Beginner help

I am saving the stack (not an individual frame) as a png file. So it should correspond with the histogram. Where i am confused is that the camera control brightness affects the black level and gamma I choose in the histogram, yet the camera control brightness is not included in the saved png. So I m...
by donstim
Thu Sep 20, 2018 5:42 pm
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 3298

Re: Live Stacking Beginner help

Thanks Dave. And thanks for the link to the histogram page. I had read all that beforehand, but promptly forgot most of it while trying to capture the image! I will have to slow down and develop a procedure to take advantage of all the options. I think it will be mostly a matter of just doing it, ex...
by donstim
Thu Sep 20, 2018 5:12 am
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 3298

Re: Live Stacking Beginner help

Thanks for the reply Robin. So Live Stacking immediately stretches the histogram? I must have missed that in the manual. I saw where it explains how a user can use the histogram tool to apply a stretch. I didn't notice that occurring in the tutorial videos I watched or in pictures I've seen posted w...
by donstim
Wed Sep 19, 2018 5:48 am
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 3298

Live Stacking Beginner help

I am using a Celestron Evolution 8 with the Revolution Imager 2 camera. When previewing an image in SharpCap of a DSO (e.g., M57), the image is as expected - a dark (basically black) background with a faint image of the object. As soon as I start Live Stacking however, I get a bright, greenish backg...