A low-cost and easy-to-operate solution for adjusting the curvature and the focal length of an adjustable reflector, which includes a curved plate, a rotation member, and a contour adjustor. The curved plate has a curvature. The rotation member engages the curved plate and rotates the curved plate about an axis and to an angular position. The contour adjustor has an adjustment surface contacting the curved plate, such that it may cooperate with the rotation member to adjust the curvature of the curved plate according to the angular position of the curved plate. Advantageously, the contour adjustor has a low manufacturing cost and a low installation cost. The contour adjustor operates without relying on additional control circuitry because it may perform its intended function while the curved plate is being rotated.