Approximate exposure for various B&W films (and some color films) in low light.
About Exposure Assistant
Exposure Assistant is a photography app developed by Matthew Bognar.
How many times has Exposure Assistant been downloaded?
Exposure Assistant has been downloaded 2.8 thousand times. In the last 30 days, the app was downloaded 6 times.
What is the rating of Exposure Assistant?
Exposure Assistant is rated 4.85 out of 5 stars, based on 86 ratings.
Is Exposure Assistant free?
Exposure Assistant costs $5.99 to download. The APK download size is 4.87 MB. The latest version available is 4.3. The last update was on January 20, 2026.
What are the requirements for Exposure Assistant?
Exposure Assistant requires Android 4.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play October 2013.
Description
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 Silvermax 100 Agfa APX 100/400 Bergger Pancro 400 Fomapan 100 Fomapan 200 Fomapan 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 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 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 Superpan 200 Rollei RPX 400
Recent changes: Added Harmon Phoenix II. Small tweaks and bug fixes.
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Easy-to-use interface Great way to compare film exposure ratings. Would be awesome to include ektar.
★★★★★A Google User· Apr 28, 2013
Must-have App for large format shooters! An amazing app for large format shooters who want to accurately calculate shutter speeds due to reciprocity failure. This is the only Android app I was able to find that specializes in these calculations. The developer is also open to suggestions and even added a couple of film types per my request.
★★★★★Alfred Anheier· May 9, 2022
Very useful for long exposure on film, especially with pinhole cameras. Calculations seem to be good, have to use different films to confirm.
★★☆☆☆Dagan Sassarini· Jul 1, 2015
Not Impressed I found this app to be inaccurate when shooting Ilford films (Delta 100, Delta 3200, HP5, Pan F Plus). There is no option to choose whether you want to adjust for just exposure time or stops, you must adjust both. So good luck basing your exposure on a particular aperture. The compensations merely follow the graphs provided by the film producer and do not seem to be tested or accurate to my standard. Film selection is few. Research and testing are better methods for dealing with reciprocity.
★☆☆☆☆Tom Gumpel· Jul 20, 2025
Absolutely garbage. I was shocked to see that there was no trial before paying for this app, and no return option, but decided to try anyway. This is an utter waste of money. The app does not allow one to calculate time based on added filters, nor does it allow for adding fractions of time, such as 1/8...you must first calculate the decimal equivalent. Better to simply use chat gpt. Save your money and refuse to support shoddy work
Google Play Rankings for Exposure Assistant
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Technologies used by Exposure Assistant
Exposure Assistant is requesting 2 permissions and is using 0 libraries.
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