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image M31-400-a.jpg is Copyrighted by Roger N. Clark, www.clarkvision.com

The Andromeda galaxy, Messier 31

400 mm f/6.3 103a-F 35mm film, approximately 1 hour exposure. 4000 dpi scan.

The Exposure Factors, CEF, CEFA are measures of the relative amounts of light received from a subject. It can be used to fairly compare wildly different lens/telescope apertures and exposure times. For this image:

To learn how to obtain stunning images like this, please visit my Extensive Articles on Photography .

Keywords to this image = astrophoto-1 galaxy Messier

Image ID: M31-400-a.jpg

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Last updated September 05, 2024