App Description

A helpful tool for calculating the total GN value of a set of flash.

With the formula: GN = f-stop × distance
We can easy to find the ideal distance.

It can be used as a unit of distance in feet or meters.

iPhone Screenshots

(click to enlarge)

GN Calculator screenshot 1

iPad Screenshots

(click to enlarge)

GN Calculator screenshot 2

App Changes

  • November 21, 2014 Initial release

Other Apps From Chai Fung Cheng

Doggie Audio Bug Detector Doggie Code Doggie Effect Doggie Graffiti 迷宮 - 拯救公主