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Exposure_Assistant

Low Light Film Photography
Matthew Bognar · Photo & Video
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App info

Developer
Matthew Bognar
Category
Photo & Video
Released
Oct 19, 2026
Version
5.1.0 (Oct 19, 2026)
Price
$4.99
Size
5.2 MB
Requires
iOS 26.0
Age rating
16+
Languages
English

In-app purchases

none
Current prices, App Store US.

About Exposure_Assistant

This application approximates the length of exposure for various B&W films (and some color films) in low light situations. In low light, extra exposure is needed due to reciprocity failure (also known as the Schwarzschild effect). As such, your camera's meter is not accurate in low light. This application approximates the proper exposure time (based upon manufacturers datasheets). A timer is now included in the application. The application warns when the user enters an exposure longer than described in manufacturer's datasheets. Although the exposure in these instances is crudely approximated by mathematical extrapolation, it is crucial that users conduct their own exposure tests in these very long exposure situations. Current supported films: Adox CHS 25/50/100 Adox CHS 100 II Adox CMS 20 II Adox HR-50 Adox Silvermax 100 Agfa APX 100/400 Bergger Pancro 400 Fomapan 100 Fomapan 200…
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