3 Free iPhone Apps Every Film Photographer Should Know About
Film photography is wonderfully rewarding, but it comes with a few challenges that digital photographers rarely have to think about.
Whether you’re calculating exposure times for a pinhole camera, compensating for bellows extension on a large format camera, or dealing with reciprocity failure during long exposures, getting the exposure right can involve a surprising amount of maths.
To make life a little easier, I’ve developed three free iPhone apps specifically for film photographers.
Each app is designed to solve a particular problem, with simple controls, useful features and accurate calculations based on available manufacturer data.
And the best part? They’re completely free, with no subscriptions, no adverts and no accounts required.
1. Fomapan Reciprocity: Take the Guesswork Out of Long Exposures
If you shoot Fomapan black and white film, you’ll know that reciprocity failure can make long exposure photography a little unpredictable.
As exposure times increase, film doesn’t always respond to light in a linear way. An exposure that your light meter suggests should take a few seconds could actually require considerably longer.
Fomapan Reciprocity makes these calculations quick and straightforward.
Simply select your Fomapan film, enter your metered exposure and let the app calculate the corrected exposure time.
Key features
- Reciprocity correction for supported Fomapan films
- Full, half and third-stop exposure intervals
- Compensation for ND and coloured filters
- Built-in exposure countdown timer
- Warnings when calculations exceed published manufacturer data
- Light and dark display modes
Whether you’re photographing landscapes with an ND filter, experimenting with long exposures or working in the studio, the app helps you spend less time calculating and more time making photographs.
Best for: Photographers using Fomapan black and white film, particularly for long exposures.
Download Fomapan Reciprocity for Free
2. DBW FilmCalc: Bellows Compensation and Reciprocity in One App
Large format and close-up film photography introduce another challenge: bellows extension.
When you move your lens further away from the film plane, less light reaches the film. This means your metered exposure needs adjusting to compensate.
And if you’re also making a long exposure, reciprocity failure needs to be considered as well.
DBW FilmCalc brings both calculations together in one convenient app.
Enter your lens focal length, bellows extension, film and metered exposure, and the app helps you determine the exposure required.
Key features
- Bellows extension compensation in stops and exposure factors
- Film reciprocity calculations using published manufacturer data
- Combined exposure calculations
- Support for popular Ilford, Kodak, Kentmere and Fomapan films
- Option to add your own film stocks
- Measurements in millimetres or inches
- Large, full-screen exposure countdown timer
- Light, dark and red night display modes
One particularly useful feature is the ability to combine bellows compensation with reciprocity correction, eliminating the need for separate calculations when working with large format cameras.
The app also works offline, making it ideal for photographers working in remote locations.
Best for: Large format photographers, macro photographers and anyone working with extended bellows or long exposures.
Download DBW FilmCalc for Free
3. DBW PinholeCalc: A Simple Exposure Calculator for Pinhole Photography
Pinhole photography is one of the most enjoyable ways to explore the fundamentals of photography.
With no conventional lens and often extremely small apertures, exposure times can become much longer than those encountered with a normal camera.
The challenge is converting a light meter reading into a usable exposure for your pinhole camera, then accounting for any reciprocity correction.
DBW PinholeCalc handles those calculations for you.
Enter your light meter reading and pinhole aperture, select your photographic material, and the app calculates the exposure time.
Key features
- Exposure calculations for pinhole cameras
- Save your camera’s aperture for future use
- Calculate the aperture of a homemade pinhole camera using pinhole diameter and distance to the film
- Reciprocity correction for supported black and white films
- Support for photographic paper using custom material settings
- Add your own film or paper reciprocity values
- Large, easy-to-read exposure timer
- Light, dark and red night display modes
The app is particularly useful for homemade pinhole cameras, where apertures can be unconventional and exposure calculations aren’t always straightforward.
You’ll still need an external light meter, but once you have your reading, the app takes care of converting it into a practical starting exposure.
Best for: Pinhole photographers using black and white film or photographic paper, including photographers building their own cameras.
Download DBW PinholeCalc for Free
Why I Created These Free Photography Apps
At Digital Black & White, my focus has always been on making the technical aspects of black and white photography more accessible.
Film photography is about creativity, experimentation and enjoying the photographic process. While understanding exposure calculations is important, having a reliable tool to handle the repetitive maths can make photography much more enjoyable.
These three apps were developed with that philosophy in mind.
They’re focused tools that do a specific job without unnecessary complexity.
All three are free to download, require no account, contain no advertising and collect no personal data.
Which App Should You Download?
That depends on the type of film photography you enjoy.
Choose Fomapan Reciprocity if you regularly shoot Fomapan film and want an easy way to calculate long exposures.
Choose DBW FilmCalc if you use a large format camera, photograph close-up subjects or need bellows and reciprocity calculations together.
Choose DBW PinholeCalc if you enjoy pinhole photography and want a straightforward way to calculate and time your exposures.
Of course, there’s nothing stopping you from installing all three!
Download All Three Free iPhone Photography Apps
All three apps are available through Apple’s App Store and are designed to make traditional film photography a little more straightforward.
Remember that reciprocity calculations are based on available manufacturer information or your own custom values. Film, developer and shooting conditions can affect real-world results, so it’s always worth testing or bracketing important exposures.
If you’re looking for practical tools to help with your film photography, I hope you’ll find these apps useful.
Explore all three apps, learn more about their features and find the download links here:
View All Free iOS Photography Apps at Digital Black & White
Happy shooting!