Exposure_Assistant

Low Light Film Photography

Only for iPhone

$7.99

iPhone

Film photography exposures are now easy - account for reciprocity failure (long exposures), filter factor, and bellows extension (for large format shooters) in one app. 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). The application allows for bellows extension and filter factor. 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 Fomapan 400 Foma Ortho 400 Fuji Acros 100 Fuji Acros II 100 Fuji Provia 100F Fuji Velvia 50 Fuji Velvia 100 Fuji Pro 160 NS Fuji Pro 400H Fuji Superia 200/400 Harmon Phoenix II 200 Ilford Delta 100 Ilford Delta 400 Ilford Delta 3200 Ilford FP4 Plus 125 Ilford HP5 Plus 400 Ilford Ortho Plus 80 Ilford PanF Plus 50 Ilford SFX 200 Ilford XP2 Super 400 Kentmere Pan 100 Kentmere Pan 200 Kentmere Pan 400 Kodak Ektar 100 Kodak Portra 160/400 Kodak TMAX 100 Kodak TMAX 400 Kodak Tri-X 320/400 Rollei IR 400 Rollei Ortho 25 Plus Rollei Retro 80S Rollei RPX 25 Rollei RPX 100 Rollei RPX 400 Rollei Superpan 200

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Bellows extension and filter factor are now included in the exposure calculations.

Version 5.3.0

The developer, Matthew Bognar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Matthew Bognar
    Size
    5.5 MB
    Category
    Photo & Video
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    English
    Age Rating
    16+
    Copyright
    © Matthew Bognar
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by Matthew Bognar