[iOS] Free: FocusFinder Depth of Field/Dof (Was $2.99) @ Apple App Store

FocusFinder is a beautifully-designed, intuitive app that allows you to precisely calculate and view the so-called depth-of-field, i.e. the length of the sharp area in a photo. Knowing your Depth of Field allows you to create impressive effects in your photography and helps you to create better pictures.

FocusFinder calculates the near and far end and the length of the sharp range, as well as the hyperfocal distance, and visualizes them for you. Additionally, it calculates how blurry objects at certain distances will become, and shows you the size of the blur circles.

CALCULATION OF ANYTHING YOU NEED
Depth of Field
Near and Far Distance
Hyperfocal Distance
Field of View