Abstract: A television camera tube comprising, in an evacuated envelope, an electron gun to generate an electron beam which during operation of the tube is focused to form a spot on a photosensitive target. On the target, a potential distribution is formed by projecting an optical image on it. By scanning the target with an electron beam, signals corresponding to the optical image are produced. The target is scanned in a line deflection direction and a frame deflection direction. According to the invention, the spot has an elongate shape, which shape is determined by a line at the edge of the spot which interconnects points having the same current density. The shape of the electron spot is such that the ratio, k, between the lengths of the long and short axes of the spot is 1.4.ltoreq.k.ltoreq.2. The long axis of the spot divides the acute angle between the line deflection direction and the frame deflection direction in such manner that0.degree..ltoreq..beta..ltoreq.60.degree.,where .beta.

Abstract: A television camera having a camera tube provided with centering means for centering the camera tube in a coil former. One type of camera tube is thus suitable for a plurality of types of camera and can be made suitable for the relevant camera by a suitable choice of the centering means to be provided at a later stage.