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Forum: Film SLRs and Compact Film Cameras
02-18-2012, 06:58 PM
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Superia 200 does pretty well in long exposures. You can either expose one stop longer, as recommended above or you might consider opening the aperture a stop instead if the longer time introduces problems (motion, etc).
If we follow the compensation pattern you would add 1/3 stop for every quadrupling of exposure time from 4 seconds on. For 128 seconds I would expose 1 1/3 stops over or about 340 seconds.
2 4 16 64 256 1024 4096 Metered Exposure
2 6 27 128 681 3400 16384 Compensated Exposure
0 1/3 2/3 1 1 1/3 1 2/3 2 F-Stop Increase in Exposure
I'm not sure how linear this continues beyond 64 seconds, but this is a good starting point. As with using any new film, test for your conditions and take good notes!
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