A highly-compact audio-visual slide projection system which makes use of an array of co-planar rear-view screen sections forming a screen matrix for presenting images selectively derived from an adjacent array of individual slide projectors. Interposed between each screen section and its correspondingly-positioned projector on the same level therewith is a V-shaped reflector assembly whose inclined front leg faces the screen section and whose reversely-inclined rear leg faces the corresponding projector. The image from the corresponding projector is forwardly directed onto an underside mirror on the rear leg of the same-level reflector assembly, which reflects the image downwardly onto an upperside mirror on the rear leg of the reflector assembly on the level below, which upperside mirror directs the image forwardly toward an upperside mirror on the front leg of the level-below assembly, this mirror, in turn, reflecting the image upwardly onto an underside mirror on the front leg of the same-level assembly, from which the image is cast onto the associated screen section, whereby an extended optical path is provided within a relatively confined space, making possible narrow angle, high-quality projection.