Search found 60 matches

by donstim
Tue Sep 25, 2018 2:10 am
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 4344

Re: Live Stacking Beginner help

Thanks Dave for posting pointers to your tips on getting good planetary images. I'm sure that will help a lot. Here were my first attempts at Saturn and Jupiter. A little overboard on the sharpening I think, but I was trying to find at least some level of detail. There are major differences between ...
by donstim
Mon Sep 24, 2018 9:19 pm
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 4344

Re: Live Stacking Beginner help

Dave, Yes, that would be great if you could write up the notes and put them into the tutorial forum. Feel free to use my image and and who's to blame for taking it! I would be glad to go through and give a test use to the document when it is uploaded. Another very basic question -- You said you used...
by donstim
Mon Sep 24, 2018 6:47 am
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 4344

Re: Live Stacking Beginner help

Dave, Well, that's way beyond where I ever expect to get to! I am more interested in EAA and saving good images as photos than getting deeply into actual astrophotography. One of the main lessons I think you are trying to convey to me is to really pay attention to the histogram to get the black/whit...
by donstim
Fri Sep 21, 2018 9:18 pm
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 4344

Re: Live Stacking Beginner help

I was referring to your M27 image here: https://forums.sharpcap.co.uk/viewtopic.php?t=297&sid=2a146e59dcc4c8ae776a8ef6b6b109cb I didn't realize SharpCap has a reticule. I will have to start using that. For alignment, I start with using the GoTo function for the aligned scope, then center the object ...
by donstim
Fri Sep 21, 2018 6:11 pm
Forum: Live Stacking
Topic: Live Stacking Beginner help
Replies: 24
Views: 4344

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: 4344

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: 4344

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: 4344

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: 4344

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: 4344

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...