# Sunny16 exposure calculator — Light. Right!

> Camera exposure calculator based on the Sunny 16 rule. (iPhone/iPad app by Signature Software Ltd..)

- Source: https://appshunter.io/ios/app/sunny16-exposure-calculator/id520156440 (this page in markdown: same URL + `.md`)
- Developer: [Signature Software Ltd.](https://appshunter.io/developer/520156444)
- Category: Photo & Video, Utilities
- Price: $0.99
- Rating: 4.80/5 from 4 App Store ratings · 10 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2012-05-22
- Data updated: 2026-08-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sunny16-exposure-calculator/id520156440/reviews.md

## What is Sunny16 exposure calculator?

Sunny16 is a fun, easy to use exposure calculator that implements the Sunny 16 exposure rule and then some. This app is ideal for anyone with a film or digital camera with an M (manual) mode who wants a quick tool to help set up the perfect exposure or anyone who wants to understand the relationships between the elements that create a properly exposed image.

Sunny 16 is a basic photographic exposure rule that works like this: If it’s sunny set your aperture to f/16 and your shutter speed to the reciprocal of your film speed. Huh? Exactly! That's why we created Sunny16. To put it another way, if your film speed (ISO) is 200 set your shutter speed to 1/200 and your aperture to f/16. But what if you want to shoot at f/8? What if it's not quite sunny? What about heavy overcast? What if you want to shoot at 1/1000? Sunny16 answers all of those questions with just a tap.

Sunny16 features:
• Equivalent Exposures: see the full range of equivalent exposures (also known as reciprocal exposures) for any film speed under natural lighting conditions.
• Exposure Compensation: easily compensate +/- up to 5 stops for backlight or other common lighting conditions.
• Implicit Priority Modes: if you set the shutter speed and then change the ISO, the lighting condition, or the exposure compensation, the shutter speed will remain the same and the f/stop will change (shutter priority). And vice versa for aperture priority. 
• Limits: if a particular shutter speed or f/stop is not available for the conditions you specify you won't be able to select it (you can try but the picker will politely roll back to a correct exposure). 
• Stop Increment: full, 1/2, or 1/3 stops.
• Lighting: naturally occurring lighting conditions expressed in EV 100. Don't worry if you don't know or care what EV is, just use the descriptions. 
• ISO: film speed from 6 to 102400.
• Shutter Speeds: from 1/16000 to 30"
• f/stops: from 1 to 32
• Add your equipment to constrain stop increments, ISO, shutter speeds, and fStops.

## Key features

- Sunny 16 rule implementation
- Equivalent exposure calculation
- Exposure compensation up to 5 stops
- Shutter and aperture priority modes
- Adjustable stop increments (full, 1/2, 1/3)
- Customizable equipment limits

## Chart rankings

- #184 in Top Paid · Photo & Video (US App Store)

## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/sunny16-exposure-calculator/id520156440/reviews.md

### 5/5 — Keep it simple!

*2026-03-19*

Simple, easy to use app, and doesn't require internet or camera access

### 3/5 — Calculate 1/3 stop different to table

*2021-02-07*

The results of the app is 1/3 stop different to tables.
EV 10 means 1/15s at f/8 (ISO100)
But the app result is 1/13s

**Developer response:** Hi Ra-Sti. Thanks for giving Sunny16 a try. 
It appears that the table you are using is for full stops. Try setting “Stop Increment” to “Full” in order to get the result you are looking for. The stop increment setting should match your camera.
There seems to be some debate about exposure settings in general. We follow the Sunny 16 rule. Hence the name of the app. If you subscribe to a different methodology, consider setting your exposure compensation to -1/3.

### 5/5 — Great instant reference

*2019-08-03*

Easy access to interactive table.  Replaces a laminated chart I had.  You could always do the conversions in your head but this just helps in verification of settings.

### 5/5 — Great little app

*2017-03-15*

👍🏻

### 5/5 — So far so good..

*2016-04-19*

It does was it says on the tin! Cheers.

### 4/5 — I like!

*2015-01-07*

Love the app so far. For the developers wish list: how about adding the ability to configure min & max shutter speed and aperture, so users can 'customize' the app for their equipment. For example, I don't need faster than 1/1000 or f1.8. 
Thnx

### 5/5 — Who needs a meter?

*2013-10-05*

Great when using older film cameras that don't have meters.

### 5/5 — Great app.  Easy to use.

*2013-04-06*

Great replacement for the paper chart I've been carrying.  I really like being able to adjust the exposure compensation (EV).  I have a few lenses that consistently over or under exposure by a as much as a full stop. 

I do wish it went down to EV -4 to include moon/star lit exposures. 

Again, great app.  Thanks!!

### 5/5 — Nice Job!

*2013-02-11*

Thanks for the update!

Great quick way to set ISO without a meter. Thanks!

### 2/5 — Almost perfect... or just real good

*2013-02-08*

Were it not for the duplicity of having to dial in the EV table, this would be great.

All I want and need to know are shutter speed, aperture, and ISO.

Adding the EV requires a guestimate on weather conditions.

EV requires data from the others and is redundant and confusing. Use one or the other. 

As a result, I rarely even look at it, and will probably delete it.

**Developer response:** Hello folsombob. Thanks for giving Sunny16 a try. The Sunny 16 exposure rule allows you to determine a correct exposure under any naturally occurring lighting condition without the use of a light meter. The rule is adaptable to any naturally occurring lighting situation you might find yourself in. However, the Sunny 16 rule works only if you are able to specify the lighting condition.

## Frequently asked questions about Sunny16 exposure calculator

### What is the Sunny16 exposure calculator?

Sunny16 is a paid app designed to help photographers quickly determine the correct aperture and shutter speed settings based on the Sunny 16 rule and various lighting conditions. It offers advanced features like exposure compensation and priority modes.

### How does the Sunny16 exposure calculator work?

It uses the Sunny 16 rule as a baseline and allows users to input lighting conditions, ISO, and desired aperture or shutter speed. The app then calculates the corresponding setting and offers equivalent exposures and compensation options.

### What are the key features of Sunny16 exposure calculator?

Key features include equivalent exposure calculations, exposure compensation up to 5 stops, implicit priority modes (shutter or aperture), adjustable stop increments, and the ability to add custom equipment to constrain settings.

### Is Sunny16 exposure calculator suitable for beginners?

Yes, the app is designed to be easy to use and helps users understand the relationships between aperture, shutter speed, and lighting conditions, making it beneficial for both beginners and experienced photographers.

### What devices is Sunny16 exposure calculator available on?

Sunny16 exposure calculator is available for iPhone and iPod devices.

### How often is Sunny16 exposure calculator updated?

The app was last updated on September 24, 2025, with version 2.0. It was initially released on May 22, 2012.

### What is the price of Sunny16 exposure calculator?

Sunny16 exposure calculator is a paid app priced at $0.99.

### Does Sunny16 exposure calculator have ads?

No, Sunny16 exposure calculator does not contain advertisements.

## Version history (last 5 releases)

### 2.0 — 2025-09-24

Clean new look.
Add your equipment to constrain your exposure settings.

Please consider reviewing our app. It helps a lot!

### 1.2.4 — 2020-01-20

Supports dark mode.

This version requires iOS 8 or later.

Please consider reviewing our app.
We will never interrupt you in-app for reviews or ratings.

### 1.2.3 — 2014-10-08

A modern bright look for iOS >= 7.
Minor bug fixes.
Please consider reviewing our app.
We will never interrupt you in-app for reviews or ratings.

### 1.2.2 — 2013-09-04

Bug fix: compatibility for iOS 5.1 and earlier.

### 1.2.1 — 2013-07-22

The app will not crash if you set impossible values. Something which became more likely with the introduction of negative EV options in version 1.2.
Sunny16 gives a warning when impossible values are chosen.

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## More apps by Signature Software Ltd.

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All apps by Signature Software Ltd.: https://appshunter.io/developer/520156444

## Related topics

[sunny16 exposure calculator](https://appshunter.io/ios/topics/sunny16-exposure-calculator) · [camera exposure calculator](https://appshunter.io/ios/topics/camera-exposure-calculator) · [ge film exposure calculator](https://appshunter.io/ios/topics/ge-film-exposure-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-09.*