A mount for optical adjustment (46, 102, 140), comprising: a first mount body (48, 104, 142); a second mount body (52, 106, 144) which is configured to secure an optical element thereto and which is movable relative to the first mount body in at least one adjustable degree of freedom; and a piezoelectric inertia driver configured to impart relative movement in the adjustable degree of freedom between the first mount body (48, 104, 142) and the second mount body (52, 106, 144), including: a rigid body portion having a first piezoelectric member mount surface and a bottom surface, a continuous and flexible resilient member made from a single piece of resilient material having a first end which includes a second piezoelectric member mount surface, a drive surface portion having a drive surface, the drive surface extending furthest from the bottom surface allowing the drive surface to engage a surface of the mount body to be driven, an axially rigid portion disposed between and secured to the drive surface portion and the first end, an S-shaped resilient portion extending from the drive surface portion, the S-shaped resilient portion having a first bend under the drive surface portion towards the first end portion and a second bend redirecting the S-shaped portion towards a second end portion, and a the second end portion being disposed between and secured to the S-shaped resilient portion and the rigid body portion, and a piezoelectric member disposed between and secured to the first and second mount surfaces (14, 24). a first mount body (48, 104, 142); a second mount body (52, 106, 144) which is configured to secure an optical element thereto and which is movable relative to the first mount body in at least one adjustable degree of freedom; and a piezoelectric inertia driver configured to impart relative movement in the adjustable degree of freedom between the first mount body (48, 104, 142) and the second mount body (52, 106, 144), including: a rigid body portion having a first piezoelectric member mount surface and a bottom surface, a continuous and flexible resilient member made from a single piece of resilient material having a first end which includes a second piezoelectric member mount surface, a drive surface portion having a drive surface, the drive surface extending furthest from the bottom surface allowing the drive surface to engage a surface of the mount body to be driven, an axially rigid portion disposed between and secured to the drive surface portion and the first end, an S-shaped resilient portion extending from the drive surface portion, the S-shaped resilient portion having a first bend under the drive surface portion towards the first end portion and a second bend redirecting the S-shaped portion towards a second end portion, and a the second end portion being disposed between and secured to the S-shaped resilient portion and the rigid body portion, and a piezoelectric member disposed between and secured to the first and second mount surfaces (14, 24). a rigid body portion having a first piezoelectric member mount surface and a bottom surface, a continuous and flexible resilient member made from a single piece of resilient material having a first end which includes a second piezoelectric member mount surface, a drive surface portion having a drive surface, the drive surface extending furthest from the bottom surface allowing the drive surface to engage a surface of the mount body to be driven, an axially rigid portion disposed between and secured to the drive surface portion and the first end, an S-shaped resilient portion extending from the drive surface portion, the S-shaped resilient portion having a first bend under the drive surface portion towards the first end portion and a second bend redirecting the S-shaped portion towards a second end portion, and a the second end portion being disposed between and secured to the S-shaped resilient portion and the rigid body portion, and a piezoelectric member disposed between and secured to the first and second mount surfaces (14, 24).