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Pleiades LRGB wide field

Started by rwodaski, 02/24/2003 03:31PM
Posted 02/24/2003 03:31PM Opening Post
I have wanted to image the Pleiades for years, but have always been put off the the blooming. It appears that dark skies make the job much easier - shorter epxosures reveal more nebula detail, so there is less blooming to deal with.

Still, the one-minute exposures I used for this image were pretty severely bloomed; here is an example:

http://www.newastro.com/remote/images/m45_bloom.jpg

Fortunately, my DeBloomer cleaned things up very nicely. I combined 17 of these one-minute images for the luminance, and 8 RGB sets of 30:30:30 seconds binned 2x2. I tried 30:30:60 seconds as well, but the uneven exposure made the blue stars too big, and they dominated even more than they do here. Didn't think that looked very good - there's some value in taking equal exposure times beyond just the conveninece.

Color balancing was difficult, but the dark skies showed my some things I didn't know, such as the area of red nebulosity at lower right. I'm guessing, but it looks to me as though there is some dust between us and the blue nebulosity in that area, including across the blank area of sky at lower right. A much deeper exposure would be required to find out for sure.

Ron Wodaski


Attached Image:

rwodaski's attachment for post 4059

Ron Wodaski
New Astronomy Press
http://www.newastro.com
Posted 02/24/2003 03:37PM #1
Forgot to post the link to the full-size version. I actually created two full-size versions. One is the same as the one at the start of this thread, only original size:

http://192.168.0.5/remote/images/PLEIADES_LRGB4.jpg

and the other has different histogram adjustments, showing more faint detail:

http://192.168.0.5/remote/images/PLEIADES_LRGB4b.jpg

I am curious to know which version you prefer. For convenience, I have included the small version of the faint-revealing image here.

Ron Wodaski


Attached Image:

rwodaski's attachment for post 65234

Ron Wodaski
New Astronomy Press
http://www.newastro.com
Posted 02/24/2003 04:02PM #2
Yoink. Hope you don't mind if I make that my desktop image!
Posted 02/25/2003 11:20PM #3
Very nice Ron...

Don Spencer
http://members.cox.net/ecdon/astrophotography.html