Search found 801 matches

by turfpit
Thu Sep 19, 2019 6:58 pm
Forum: Gallery
Topic: NGC 7635, Bubble Nebula, LRGB, 96% waning moon
Replies: 3
Views: 39

Re: NGC 7635, Bubble Nebula, LRGB, 96% waning moon

Cheers Nick. I am giving narrow band filters a go tonight.

Dave
by turfpit
Thu Sep 19, 2019 3:45 pm
Forum: Gallery
Topic: NGC 7635, Bubble Nebula, LRGB, 96% waning moon
Replies: 3
Views: 39

Re: NGC 7635, Bubble Nebula, LRGB, 96% waning moon

Some screens captured during the LRGB imaging session. Note the use of Display Histogram Stretch to be able to see what was being captured and the use of Zoom=200% plus Display Histogram Stretch to obtain a detailed view of the diffraction pattern for focus. Navi was the star used for focusing - med...
by turfpit
Thu Sep 19, 2019 3:36 pm
Forum: Gallery
Topic: NGC 7635, Bubble Nebula, LRGB, 96% waning moon
Replies: 3
Views: 39

NGC 7635, Bubble Nebula, LRGB, 96% waning moon

A first serious attempt to get to grips with imaging using LRGB filters. The conditions were not ideal with NGC 7635 on one side of a tree and the moon on the other. LRGB colour balancing using ratios has been tested without wasting good conditions. The RGB ratio used was 1.7 : 1 : 1.5. RGB was bin ...
by turfpit
Thu Sep 12, 2019 2:01 pm
Forum: Deep Sky Imaging
Topic: Cocoon Nebula - stacking multiple stacks
Replies: 7
Views: 359

Re: Cocoon Nebula - stacking multiple stacks

I suppose it is a good way to occupy those rare cloudy nights :lol:
by turfpit
Thu Sep 12, 2019 1:47 pm
Forum: Deep Sky Imaging
Topic: Cocoon Nebula - stacking multiple stacks
Replies: 7
Views: 359

Re: Cocoon Nebula - stacking multiple stacks

As regards PI, I found these task oriented tutorials useful https://www.lightvortexastronomy.com/tutorials.html. I am not ready for that step yet.

Dave
by turfpit
Thu Sep 12, 2019 11:07 am
Forum: Deep Sky Imaging
Topic: Cocoon Nebula - stacking multiple stacks
Replies: 7
Views: 359

Re: Cocoon Nebula - stacking multiple stacks

Ok different sensor but it was more about showing what the technique can achieve.

Link tells me
  • 5 stacks
  • each stack 60x30s
  • gain 74%
Dave
by turfpit
Thu Sep 12, 2019 7:36 am
Forum: Deep Sky Imaging
Topic: Cocoon Nebula - stacking multiple stacks
Replies: 7
Views: 359

Re: Cocoon Nebula - stacking multiple stacks

That is a good start for first time trying out the method. I think it is a valid technique for building up data over several nights when an object is approaching the meridian or there are only small windows of decent sky available. Have a look at what can be achieved using this strategy - note the c...
by turfpit
Tue Sep 10, 2019 8:16 pm
Forum: General Discussions
Topic: I can't find a stacked image of M27 in my Fits Lib. File
Replies: 25
Views: 653

Re: I can't find a stacked image of M27 in my Fits Lib. File

Carl I will write a tutorial and put it in one place (probably in the Tutorials sub forum). That way it has a chance of being found by many people. I will also post a link to it in this thread. I will try to learn to do screen shots very soon Good, this is important to be able to capture and post pi...
by turfpit
Tue Sep 10, 2019 7:04 am
Forum: General Discussions
Topic: I can't find a stacked image of M27 in my Fits Lib. File
Replies: 25
Views: 653

Re: I can't find a stacked image of M27 in my Fits Lib. File

Carl Let us ignore the nebulosity problem and concentrate on this stacking problem Agreed. If stacking is not working then there will be no nebulosity. What test would you like me to run in the field to prove to you that it exists? What supporting pictures and data would you like too? I will create ...
by turfpit
Mon Sep 09, 2019 8:04 pm
Forum: Gallery
Topic: Lunar, ZWO ASI120MC, mosaics, 129fps achieved
Replies: 3
Views: 86

Re: Lunar, ZWO ASI120MC, mosaics, 129fps achieved

Wikkett Thanks for the encouraging words. The lack of filter was an experiment to see what I could get with the most basic configuration - a proof of concept for some members of the local astronomy club. I usually use an IR685 filter for lunar but have experimented with a Wratten #25 red as well. Pl...