Exposure Calculator app at a glance:
- Price: Free
- Website: play.google.com/store/apps
You don’t need to be Sherlock Holmes to guess what Quicosoft’s Exposure Calculator does, but just in case you missed a few lectures at detective school, this app is designed to calculate your image exposures.
The idea is you can set the ISO, shutter speed and aperture that you are using and from there you can calculate what the shutter speed would be if you added an ND filter. However, you can also reverse that to calculate what the exposure would be if you were to put on a lower-strength ND filter or take off an ND filter altogether. Under Current Exposure, the bit where you put all your current parameters, there’s a New Exposure option as well as Tracking Options. This allows users to tweak their ISO sensitivity setting or aperture to see what it would do to the shutter speed. Tracking Options simply resets it to the base parameters of the current exposure – effectively a reset mode.
One of the best features of this app is that if you get an exposure longer than four seconds, a small timer will appear in the bottom right corner. This is linked with an alarm, too. So, if you happen to be shooting a 350-second exposure, it would calculate that in minutes and time it every step of the way, notifying you when the exposure should be finishing up. Pretty cool!
For those shooting with ND filters – or, indeed, anybody shooting long exposures – this app is fantastic. It allows you to calculate everything and tweak stuff in one easy-to-use program with a great user-friendly interface.