"focal plane" . "image point" . "Cardinal point (optics)#Focal planes" . "Cardinal point (optics)" . . "principal points" . "cardinal points" . "focal plane height" . . "optical centre" . "nodal point" . . . "Cardinal point (optics)" . "surface vertices" . . "optical center" . . "nodal points" . "nodal plane" . "Cardinal point (optics)#Surface vertices" . "cardinal point (optics)#Nodal points" . "Cardinal point (optics)#Nodal points" . "cardinal point (optics)#Focal points and planes" . "Focal Plane" . "Cardinal point (optics)#Principal planes and points" . "cardinal point (optics)#Principal planes and points" . . .