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91
Astrophotography / Re: Mark's Updated Site
« Last post by Carole on Nov 14, 2017, 12:34:32 »
Very thorough and interesting read.

You did write that there was poor software support but I don't recall reading that you had to write your own capture software. 

Carole
92
Astrophotography / Re: M52 Open Cluster
« Last post by JohnP on Nov 14, 2017, 11:18:40 »
Roger - Are you going to process both the images as a single image if they were in same frame - John
93
Alerts! Questions? Discussions... / Re: Jupiter Venus conjunction
« Last post by Apophis on Nov 14, 2017, 10:55:41 »
 :(
94
Astrophotography / Re: M52 Open Cluster
« Last post by Apophis on Nov 14, 2017, 10:53:57 »
Thanks Mark,
 Re Arcsinh , i have already got those 10 - 1000 (plus others)loaded into the Curve presets.
Both images were in the same frame so got both on one night , i was mentioning to Carole that down here
we seemed to have a clear night on 3 consecutive sundays , a kind of 7 day cycle but cant work it out, just grateful for the few we get.
Roger
95
Astrophotography / Re: Mark's Updated Site
« Last post by JohnP on Nov 14, 2017, 08:53:12 »
Mark, thorough report & nothing less than I expected from you - very good indeed - John
96
Astrophotography / Re: Mark's Updated Site
« Last post by MarkS on Nov 14, 2017, 06:09:30 »
97
Astrophotography / Re: NGC 7635 Bubble Nebula
« Last post by MarkS on Nov 14, 2017, 06:07:00 »
This is not an easy target and you've done a good job from a light polluted area.  Another 8 hours!!

If your sky is predominately orange from sodium lights rather than grey from LED lights then a light pollution filter would help with emission nebulae like this.  The IDAS P2 filter is best but it's pretty expensive now because of Brexit:
https://www.firstlightoptics.com/light-pollution-reduction/idas-p2-light-pollution-suppression-filter.html
It avoids the colour casts that the Astronomic CLS filter has.

However, the days of light pollution filters are numbered now - they are useless against the glow from broad spectrum LED streetlights.

Mark
98
Astrophotography / Re: M52 Open Cluster
« Last post by MarkS on Nov 14, 2017, 05:56:12 »
You've got some good data there.  8 hours!!  Where are you finding all these clear nights?

A star field like that is an ideal candidate on which to use Arcsinh Stretch to preserve the star colour.  Since you are using Photoshop, there's a description of how to do it here: https://www.cloudynights.com/topic/595610-photoshop-color-preserving-arcsinh-stretch/

Once you understand it, record an action for it and it will be really simple to use for future images.

Mark
99
Alerts! Questions? Discussions... / Re: Jupiter Venus conjunction
« Last post by MarkS on Nov 14, 2017, 05:49:23 »
SET YOUR ALARM FOR DAWN: On Tuesday morning, Nov. 14th, Venus and Jupiter will converge in the pre-dawn sky only 1/3rd of a degree apart. Look low and to the east about 30 minutes before sunrise. It's definitely worth waking up for!
From http://spaceweather.com/
Roger

It's cloudy right now (5:50am)

Mark
100
Astrophotography / NGC 7635 Bubble Nebula
« Last post by Apophis on Nov 13, 2017, 21:19:45 »

From the same frame as M52 Open cluster from 12/11
95 x 300 second subs (Almost 8 Hours!)
20 x Darks
20 x Flats
20 x Bias
stacked with DSS Drizzled
Processed with Adobe Photoshop CC 64bit with Camera Raw settings with Levels/Curves.
Roger
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