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By Adair Systems, LLC

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PhotoCalc is a utility for iPhone and iPod for photographers to calculate exposure reciprocation, depth of field, and flash exposure.

PhotoCalc offers handy calculations for professional or hobbyist photographers working in the studio or in the field. PhotoCalc provides exposure reciprocation, depth of field and hyper-focal distance calculations, and flash exposure calculations.

In addition to the calculators, PhotoCalc features a reference section with a glossary, and several reference documents such as the Zone System, and the Sunny 16 Rule.

PhotoCalc's reference section also contains an integrated version of Sunrise, a sunrise/sunset calculator that uses iPhone's ability to determine your location to accurately calculate the time of sunrise, sunset and solar noon for the current day, or any day you select.

PhotoCalc remembers the last position and values used, so it's easy to switch to another application or take a phone call and return to the exact same position.

PhotoCalc's features include:
- Exposure Reciprocation calculator
- Depth of Field and Hyper-focal Distance calculator
- Flash Exposure calculator
- Integrated version of Sunrise, a sunrise/sunset/solar noon calculator with a worldwide database of locations
- Reference section with glossary, and reference documents
- Configurable to English or Metric units
- Configurable to use half or third stops
- Comprehensive camera database for Depth of Field calculations
- Saves position, so it's easy to switch in and out

(Please note: version 1.2.1 of PhotoCalc is required for compatibility with Apple's OS 2.2.1 update!)

What's New in Version 1.2.3

Updates in this version include:

- iOS 4.0 compatibility and enhancements
- an updated camera database for depth of field calculations
- a refreshed user interface for reference material

iPhone Screenshot

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Customer Reviews

A great tool for shooting manual flash.

I've only been out and used this app once for about 30 mins and it did what I needed it to do... Math for me! I shoot Canon with the older 580EX - which is a great flash anywhay, but I wanted to shoot more manully with my flash and control the light. This tool helped accomplish that. I did have a couple issues I will post to the creators... 1) It took me a few shots to realize that you have to enter in the Guide Numbers in Meters, even though the distance scale was in Feet / Inches. It would be nice to choose either Meters or Feet and have every reading match that way. 2) the scroll wheels were very touchy and I over shot my settings often. But I got what I needed eventually.

You need this for Bokeh

In the 35 mm days, lenses had a depth of field guide built in. However, with autofocus this information has disappeared. Photocalc does the calculations and presents the info clearly, actually, giving more information than was shown on the old lenses. Since the difference between a great photo and a so-so photo is often the Boken, knowing depth of field is vital. I use Photocalc mostly for depth of field, but the flash portion is also very nicely done. Controls are intuitive and work smoothly. Glossary and sunrise/sunset are fun bonuses.

Great App for the Field Input Could be Easier, Though

I've got this on my iPhone and it works just fine.

You have to be careful, though when you input the guide numbers. Everything has to be entered with the apeture setting at f1, the ISO at 100 and the flash at full power. Set the subject distance to be the calculated distance and if it matches the guide number, you're good to go.

The calculations match the numbers in my flash manual so no problem with the accuracy.

The camera exposure reciprocation should be set to the "Sunny 16" rule and works just fine. You can manually enter all the data on that feature.

The only reason I didn't give this 5 stars is due to the clumsy inputting.....I agree with an earlier review that a keyboard-style entry would make life easier.

All in all, though, a handy little app.

View In iTunes
  • $2.99
  • Category: Photo & Video
  • Updated:
  • Version: 1.2.3
  • Size: 0.7 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 3.1 or later. Compatible with iPhone, iPad, and iPod touch.

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