An autofocus camera comprising: - an image sensor, - an optical block comprising a plurality of lenses with fixed focal length, - an optical device with variable focal length comprising: a deformable membrane, a support to which a peripheral anchoring area of said membrane is connected, a cavity filled with a constant volume of fluid, said cavity being delimited at least in part by said membrane and a support wall, an actuation device of an actuation region of the membrane extending from the peripheral anchoring area towards a central part of the membrane, configured to bend by application of electrical actuation voltage so as to displace some of the fluid volume towards the centre or towards the periphery of the cavity, wherein at least one region of the optical device distinct from the central part and the actuation region of the membrane is mechanically and permanently deformed by a component of the autofocus camera such that the at least one region protrudes into a volume of the cavity so as to cause a deformation of the central part of the membrane by displacement of the fluid, wherein when the actuation device is at rest, the focal distance of the optical device under the effect of said displacement of the fluid is different from the focal distance of said optical device without the displacement of the fluid. - an image sensor, - an optical block comprising a plurality of lenses with fixed focal length, - an optical device with variable focal length comprising: a deformable membrane, a support to which a peripheral anchoring area of said membrane is connected, a cavity filled with a constant volume of fluid, said cavity being delimited at least in part by said membrane and a support wall, an actuation device of an actuation region of the membrane extending from the peripheral anchoring area towards a central part of the membrane, configured to bend by application of electrical actuation voltage so as to displace some of the fluid volume towards the centre or towards the periphery of the cavity, wherein at least one region of the optical device distinct from the central part and the actuation region of the membrane is mechanically and permanently deformed by a component of the autofocus camera such that the at least one region protrudes into a volume of the cavity so as to cause a deformation of the central part of the membrane by displacement of the fluid, wherein when the actuation device is at rest, the focal distance of the optical device under the effect of said displacement of the fluid is different from the focal distance of said optical device without the displacement of the fluid. a deformable membrane, a support to which a peripheral anchoring area of said membrane is connected, a cavity filled with a constant volume of fluid, said cavity being delimited at least in part by said membrane and a support wall, an actuation device of an actuation region of the membrane extending from the peripheral anchoring area towards a central part of the membrane, configured to bend by application of electrical actuation voltage so as to displace some of the fluid volume towards the centre or towards the periphery of the cavity, wherein at least one region of the optical device distinct from the central part and the actuation region of the membrane is mechanically and permanently deformed by a component of the autofocus camera such that the at least one region protrudes into a volume of the cavity so as to cause a deformation of the central part of the membrane by displacement of the fluid, wherein when the actuation device is at rest, the focal distance of the optical device under the effect of said displacement of the fluid is different from the focal distance of said optical device without the displacement of the fluid.