An L-shaped holder for optical devices, in particular cameras, comprising a first exchangeable plate that can be fastened to the housing of the optical device by means of a screw, a second exchangeable plate and a connector having two webs separated by an angled section for connecting the two exchangeable plates, each exchangeable plate being arranged on one of the webs of the connector, which is characterised in that the exchangeable plates are connected to the connector such that the exchangeable plates can be moved on the connector.