Reciprocity app for iPhone and iPad

Reciprocity easily calculates exposure settings for great pictures every time. Great for anyone, from beginners to seasoned photographers.

Features:
* Instantly calculate Exposure value, ISO speed, Aperture, or Shutter Speed
* Enter values either directly or via a slider
* Option to choose Exposure value from a list of common scenes
* Convert exposure settings between different cameras or film speeds
* Save the reciprocity failure values of multiple films for future use
* Round exposure stop values to 1/2, 1/3 or both
* Built-in timer for exposure longer than 2 seconds
* Detailed user guide to help beginners make use of their cameras manual settings