Exposure is a tool for photographers that allow you to calculate proper exposure and correct values of:- ISO- Aperture- Shutter speed- EVThe application allow manual mode, Shutter priority mode and Aperture priority mode.Neutral Density Filter correction.EV Correction.Support App2SD.Easy and accurate Deep Of Field Calculator (DOF) and Hyperfocal Distance for your camera. Just specify your camera model, the focus length, f-stop, and subject distance.Accurate- Near limit- Far limit- Deep of Filed- Hyperfocal distanceUseful gray card tool. Change color of your screen in black, white, neutral gray with the possibility to change gamma valueMinimum shutter speed to yield an adequately sharp image of a moving subject.