[pure-silver] Re: Sunburns photos

På Sun, 27 Apr 2008 05:28:12 +0200, skrev <mmagid3005@xxxxxxx>:
Thanks for the link, Adrienne.  Those are really interesting photos.  Does Anyone know the math for calculating the exposure time if you want an arc length X of the sun's path on the paper while using a Y focal length lens? 



Marty 
The sun moves 15 degrees per hour - or 360 degrees in 24 hours as we all know.
Take the angle of view of the Y focal length on your Z film dimension, and it's simple arithmetic. No equation necessary at all. 

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Ole Tjugen

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