Depth of Field CalcThis tool will calculate the depth of field for a given sensor or film type, aperture, focal length, and subject distance (the distance from the camera to the person or object you are focusing on). A lower number means that a large proportion of the background will remain in sharp focus and a higher number means that a smaller proportion (if any) will be in focus.
It also includes presets for popular video cameras. Selecting a preset will automatically change the sensor type to fit your camera.
Please be aware that this tool is designed for cinematographers, not still photographers.
iPod touch and iPhone Web apps
Depth of Field Calc 
