>Ive downloaded the Nikonians DOF app but would appreciate a >little help >First mine is set for meters is it possible to configure >for feet and inches ??? > >secondly in the 3 entry fields please clarify Focal length >and aperture are obvios but distance ?? does it refer to >focus distance ?? > >perhaps there is an article here that helps explain the app >better > >any help on understanding this calculator is greatly >appreciated What Nikonian DOF app? Where?