Re: [APML] M39

[Ray Butler <ray.butler@nuigalway.ie>]

Hi Alan,

I'm no Photoshop expert, but [- how many times have you heard that 
opening proviso?! -] maybe you need to ease off the curves correction a 
bit? The stars are still coming out apparently "quantised" into three 
distinct brightness levels, instead of a gradual fade to black from a 
central bright peak. I may be wrong, but I think that overdoing curves 
can cause this stepped effect. It is understandable that the stars might 
go awry if you are mainly focusing on the nebula while making the PS 
corrections.

Ray "who repeats that he's no Photoshop expert, but does have an eye for 
irregular changes in a star's profile" Butler


Alan Voetsch wrote:

>Hey all,
>
>As impressive as M37 and M11 are in the EP, M39 is equally
>*UN*-impressive. However, I had time to kill as I was waiting for
>IC5146 to rise out of the soupy skyglow from Medford and Jacksonville.
>It's a composite of an 80 minute shot on Fuji SHQ200 and a 50 minute
>shot on Kodak E200. I actually had finished it yesterday but looked
>again today and saw how horrible it was, so I touched it up and feel it
>is presentable. It's here: 
>
>http://www.pbase.com/image/46484947
>
>For you local guys (SOS), I have also attempted to improve the recently
>posted Cocoon shot. It is a bit better, I think. The link:
>
>http://www.pbase.com/image/34306024
>
>Alan
>
>SCT Astrophotography: http://www.pbase.com/avoetsch/astrophotography
>FS-102 G-11/Gemini: http://www.pbase.com/avoetsch12952/tak_fs102
>& http://www.pbase.com/avoetsch12952/fs102
>& http://www.pbase.com/avoetsch12952/takpf
>
>
>		
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-- 
Dr. Ray Butler
Lecturer, Physics Department & Computational Astrophysics Laboratory,
National University of Ireland - Galway, 
University Road, Galway, Ireland. 
Web: www.nuigalway.ie/physics/ 	Email: ray.butler-AT-nuigalway.ie 
Tel: +353-91-493788 		FAX: +353-91-494584

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