Article of manufacture for projection television system

For use in a projection television system, a cathode ray picture tube whose projection optical axis is displaced from the axis of a remotely located viewing screen by a non-zero acute angle A, and with a cathodoluminescent imaging screen whose axis is substantially coincident with said projection optical axis and normally coincident with the electron-optical axis of said tube, said imaging screen providing an electron-formed visible image for projection on said viewing screen, said cathode ray picture tube having a conjoinable face panel with a rearwardly extending skirt and a funnel which mate along interfacing seal edges, said funnel seal edge being formed to define a plane whose normal makes an angle with respect to the funnel axis substantially equal to one-half said angle A, and with said face panel seal edge formed to define a plane whose normal makes an angle with respect to the imaging screen axis substantially equal to one-half said angle A, said funnel being aligned with respect to said face panel to tilt said electron-optical axis with respect to said projection optical axis by an angle B substantially equal to said angle A, such that when said seal edges are conjoined, the value of said angle B and the orientation of said electron-optical axis causes said electron-formed visible image to have an orientation oand non-linear magnification distortion effective to substantially compensate for the off-axis-induced, non-linear magnification distortion of the light image projected thereby on said viewing screen.