RE: [APML] Another image from down under.

["Kolb, Jon" <jkolb@noochee.com>]

Magnificent image, John.  

Sincerely,
Jon Kolb
http://home.datawest.net/jkolb/index.htm
jkolb@noochee.com


-----Original Message-----
From: John Gleason [mailto:dvj@earthlink.net]
Sent: 22 April, 2000 9:16 PM
To: astro-photo@seds.org
Subject: [APML] Another image from down under. 




Slowly working through some images shot 10 days ago.  Interestingly enough,
I "added" these two PPF negatives together of the Gum nebula instead of
using the "blend" mode in Picture Window.  The film grain remained low and
the result provided a nice boost on the fainter, outlying regions of the
Gum superbubble of gas.  

Text: 

One of the closest supernova remnants in the sky is the Gum Nebula. It
appears as a giant  bubble of gas across the rich starfields of the Milky
Way. The objects 
in the image are below the horizon for most northern hemisphere observers.
(Probably visible from the Florida Keys and Hawaii)  Even from the most
transparent night sky locations it is difficult if not impossible to see
any portion of the Gum nebula with the naked eye. However, modern films and
digital processing techniques can record much of its extensive sky
coverage.  This image covers an area of  sky through the constellation's
Canis Major (top), Puppis & Vela (center), and Carina (bottom). Angular
size of the nebula is 75 x 40 degrees. Its distance is roughly 1400 light
years from the Earth, with the nearest edge of the nebula only 450 light
years away. It was discovered in 1952 by Australian astronomer Gum. 

Technical: 

*  2 x 35 minute exposures shot simultaneously with a pair of Pentax 67
cameras and 105mm lenses @ f/4.
*  Losmandy G11 w/ST4.  
*  Unhypered PPF 400.
*  Negatives aligned and added in Picture Window, enhanced in Photoshop. 

http://www.celestialimage.com/page107.html

John Gleason, dvj@earthlink.net
http://www.celestialimage.com



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