A mount for an optical apparatus having an image recording unit and an image rendering unit includes a first securing device for the recording unit, a second securing device for the rendering unit, and a connecting rail interconnecting the securing devices. The connecting rail is arranged so as to be displaceable in the y-direction in relation to the second securing device via a linear actuator. The first securing device includes a rotation device arranged so as to be rotatable about an axis of rotation extending in the x-direction. The mount includes a controller which is configured to displace the connecting rail in the y-direction in relation to the second securing device via the actuator when the first securing device is rotated about the tilt axis such that the distance between the focal point and the second securing device is kept constant within a certain interval.