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- Mar 5, 2009
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Since Acros has such good reciprocity characteristics I would recommend trying that to maximize your success with this project.
Andrew Sanderson's 'Night Photography'. ISBN 1 902538 12 9.
Should tell you everything you need to know.
Agreed. Great book. Tells you everything you'll need to know.
Btw... I would recommend a 400 speed film, unless you have lots of patience..
When you are dealing with long exposures and reciprocity effects the 400 speed film can actually need a longer exposure than a film like Acros depending on that films formulation.
Delta is not a direct substitute for Acros.
When you are dealing with long exposures and reciprocity effects the 400 speed film can actually need a longer exposure than a film like Acros depending on that films formulation.
How does one arrive at these exposure times?
Right on! And I'll add to that -- Keep notes so that one can repeat one's successes and avoid repeating one's failures.Generally through lots of failure... and bracketing... and suggestions from others
For a good starting point for night exposures, go to this URL [http://www.stacken.kth.se/~maxz/programming.html] and scroll down to "New Jiffy Night Calculator" and download the files. I started using these when it was first published in 1963 and it has never failed me. When I used it then for slides, the exposures were bang on. For long exposures, it is a good place to start and then correct for reciprocity failure.
Steve
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