Abstract: A support device for supporting a person's arm when the arm is extended. The device can also be used to support an optical instrument such as a camera. The support device has a base structure adapted to be worn about a person's waist, proximate the hip. A support shaft extends from the base structure. The support shaft has a predetermined extended length between a first end and a second end. The support shaft contains a piston between its two ends. The presence of the piston enables said support shaft to be contracted to a contracted length that is less than its normal length. This enables a person to move his/her arm up and down while still being supported. The support shaft connects to the base structure with a ball and socket joint. Consequently, the support shaft is also free to move back and forth with that person's arm.