LensTutorial is about learning to use photographic lenses the easy way. The app wraps all lens calculations into one package and allows you to quickly see them in action. Learning photography can be easy and we encourage you to use our app to facilitate this process. LensTutorial allows to simulate photographic lens usage and display effects of lens controls manipulation. The app combines both visual and interactive way of representing information with classic DOF calculator functionality. It allows to quickly estimate and visualize the following parameters on one screen: Angle of view Total depth of field Near range of depth Far range of depth 35-mm equivalent of focal length Subject magnification All modern cameras of various makers supported.