Abstract: A front projection apparatus has a tubular adaptor (22) which can be connected to a camera lens system housing (25) at one end and received at the other in an aperture (19) in a wall (20) of the apparatus, in a position such that the lens system views an image projected by the apparatus along the projection axis (12). A flange (26) on the adaptor defines the position of the lens system along the projection axis and the adaptor can be clamped in place by this flange. The camera body (29) is slidable axially of the lens system on a vertically adjustable support (14), so the camera can be focussed without changing the positions of the lens system on the projection axis.