[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
RE: [APML] Wide field Milky Way
Carlos,
Thanks for the comments. Yes, I could have done a AV for some of the
light fall off, but I liked the way it draws your attention to the Milky Way, so
I chose to leave it.
The red's were definitely not "over processed". Checking the histogram
and color sampler reveals a fairly consistent color balance, unless I'm
missing something. The red halo's were present in the original scan and actually
show to some degree in the print I received back from processing. I corrected
"some" of the halo problem, but I agree it could use some more work. When I have
time I'll work on it a bit more.
Thanks again for the feedback.
Scott Hammonds
>This is another
image taken from my trip out west, I've been slow getting >some of the last
ones processed.
Nice image. You
revealed a lot of details in the nebulaes. Anyway, i think that it needs an
antivigneting mask to get a more uniform backgrounf. Also the red seems to be a
little overprocessed in relation to the other channels. You can see that in the
star's coloration. Perhaps using a luminance mask with the curves adjustement
you can obtain better results.
>This 35mm lens
shows some aberrations, which are not evident at web >resolution, near
the edges, but overall I am pretty happy with the >results.
Wich lens did you
use? The f/2.8 one? I ask becouse I want to buy a 35mm lens, but I heared
that the f/2.0 one has a better optical quality.
> Can anyone tell
me what causes red halo's around the brighter stars
I think that is a
mixed effect between the film you used and the overprocessed red channel. It is
caused due to halation in that layer, and when you adjust the contrast in that
channel and bring up the shadows/middtones this halation becomes brighter
enought to be visible. Posible solutions: make curves adjustements using
luminance filters and wach out the halation. Use SMI or similar techniques to
bring up the nebulaes with a little gaussian blur applied.
Regards,
Carlos
Milovic F.
-------------------------
Astro & Photo -
CMF
http://www.astrophoto.vze.com
-------------------------
Visita
"AstroFoto", el foro de astrofotografía en
español
http://espanol.groups.yahoo.com/group/astrofoto
_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo
