Over | Under 4+

exposure value calculator

Stanislav Bondarenko

Designed for iPad

    • 5.0 • 6 Ratings
    • $2.99



Calculate and compare aperture, shutter speed, shutter angle, frame rate, light sensitivity, and transmittance values. Configure the interface to suit your workflow.

Over | Under is a simple and intuitive tool that gives photographers and cinematographers the ability to calculate and compare common photographic exposure parameter values – aperture, shutter speed, shutter angle, frame rate, light sensitivity, and transmittance.

Over | Under was created by working cinematographers for professional image makers, students, and hobbyists alike to help answer the questions that frequently arise on any set:

How much light will I lose if I close the lens aperture down from f/1.8 to f/5.6?

I can't add more light, but I want to maintain the same exposure level I had before I changed the aperture. My shutter was set to 1/2000s of a second; what should it be to compensate for the light loss?

I was shooting video at 24fps with 5 stops of ND in the matte box. I switched to 120fps for a slow motion sequence, and opened the shutter angle to 227º to regain some motion blur. I will be switching to standard speed shortly, and don't want to relight twice. How many stops of ND should I remove to maintain the same exposure level?

Over | Under can answer these and many more questions, in a simple, intuitive interface inspired by an all-familiar aperture ring.

Ratings and Reviews

5.0 out of 5
6 Ratings

6 Ratings

Lauren guiteras ,

Must-have cine app

Love using Over Under as a DP, and I’m sure camera assistants will find it useful as well.

It’s great for designing bracketed exposure tests - since finding this app, I haven’t designed a camera test without it! I also find it helpful for calculating fractional exposure changes when I have to use specific shutter angles to compensate for flickering practicals. I especially love that I can calculate cumulative changes across multiple exposure parameters. And unlike many cine apps, this one is intuitively and cleanly designed. 🙏🏽

DoP Kali ,

Brilliant, so very helpful!!

As a professional cinematographer I love this app, it’s so convenient to have this quick calculating power at your fingertips. Given all the things to think about and consider on set it’s nice to have a quick and easy way to reliably make exposure adjustments. It’s a great and handy tool to have!!

jackievresics ,

Useful for ACs

I’m a camera assistant who’s terrible at math so I find this super handy on set

App Privacy

The developer, Stanislav Bondarenko, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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