Exposure Calc aka iKspozher is a exposure computing tool for Nature Photographers. iKspozher calculates optimal exposure settings (with respect to incident light) for a given scene for a photograph for a varying choice of aperture, shutter speed and ISO speed of the sensor. In this version, there are about 70+ scene choices, the ISO speed ranges from 3 to 3200, aperture range from 1 to 90 and shutter speed from 1/8000 to 130 sec with 1/2 shutter/aperture stops.