Abstract: An optical apparatus includes a light quantity adjusting member arranged to vary a quantity of light when the member is moved, a stepping motor arranged to drive the light quantity adjusting member, a luminance detecting part for detecting the luminance of a shooting object on the basis of the quantity of light obtained through the light quantity adjusting member, and a control circuit for driving and controlling the stepping motor in such a way as to make a difference between the luminance of the object detected by the luminance detecting part and a target luminance value smaller, the control circuit being arranged to change the driving speed of the stepping motor to be lowered when the object luminance comes near to the target luminance value.

Abstract: An image sensing apparatus comprising an electronic zooming function and an optical system capable of varying a focal distance. The image sensing apparatus includes a control circuit for making control when the focal distance of the optical system is changed under photographing on condition that the optical system is positioned at the tele end and magnification of an image sensing device is changed in a region where the electronic zooming function is to be effected, such that the electronic zooming function is effected to change the magnification of the image sensing device to the wide side.