A lens apparatus includes an optical system including multiple lens units, the optical system including: a first lens unit which is disposed closest to an object side in the optical system and is rotatable about a point in a vicinity of an optical axis of the optical system; and at least one lens unit which is movable in a direction including a component in a direction perpendicular to the optical axis. The following conditional expression is satisfied: 1.0<ft/|f1|<2.2, where ft represents a focal length of the optical system at a telephoto end, and f1 represents a focal length of the first lens unit. At least one of rotation of the first lens unit or movement of the at least one lens unit in the direction including the component in the direction perpendicular to the optical axis changes an image formation position in the direction perpendicular to the optical axis.

An optimum low-pass filter effect according to various photographing condition parameters related to photographing conditions is obtained with flexibility without forcing the user to perform a troublesome manual operation in a photographing apparatus which drives an image sensor to obtain an optical low-pass filter effect. The photographing condition parameter setters set parameters related to photographing conditions. The image sensor drive controller changes the drive range of the image sensor and the optical low-pass filter effect, which are defined by the image sensor driver, based on the photographing condition parameters set by the photographing condition parameter setters.

An aperture module is provided. The aperture module includes a blade unit including a plurality of blades configured to form an incidence hole through which light passes, the plurality of blades being provided in (2M1) layers in an optical axis direction, the plurality of blades disposed in each layer being provided in (2N+1) members, where M and N are natural numbers, a rotator on which the plurality of blades are rotatably seated, and an aperture driver configured to rotate the rotator and change a size of the incidence hole. In the plurality of blades, blades disposed on different layers of the (2M1) layers overlap at least partially in the optical axis direction, and blades disposed on a same layer of the (2M1) layers do not overlap each other in the optical axis direction.