The magnification given by Eq. (3-33) is also valid for a double-lens eyepiece if the equi...

The magnification given by Eq. (3-33) is also valid for a double-lens eyepiece if the equivalent focal length given by Eq. (3-35) is used. Show that the magnification of a double- lens eyepiece, designed to satisfy the condition for the elimination of chromatic aberration, is, for an image at infinity,