Abstract: An inertial pendulum stabilizer is utilized for stabilizing the lens train of an optical instrument to be stabilized, such as a television camera, against accidental angular motion. A substantially spherical optical doublet having a leading negative lens element and a trailing positive element with both lens elements together being afocal is utilized. The leading negative lens element is fixed in front of the lens train of the optical instrument to be stabilized. An inertial pendulum has the positive optical element lens fixed to the front of the pendulum, this positive element being located between the leading negative lens and the lens train of the optical element to be stabilized. The inertial pendulum pivots on two intersecting and mutually perpendicular axes. The inertial pendulum is attached to the lens train to be stabilized so that the two mutually perpendicular and intersecting pivot axes intersect the lens train of the optical element to be stabilized.