Abstract: A microfilm reading device in which a lens carrier is provided with two projecting lenses which are in axial parallel alignment with each other. Through actuating a handle which is disposed between the projecting lenses, the projecting lenses can be moved from a first position in which the lens is brought in alignment with a micrograph to be projected into a second position in which the lens is lifted while the other lens is brought in alignment with the micrograph.

Abstract: An objective lens supporting arrangement for microfilm reader. The objective lens is axially movable and at the same time non-rotatably mounted with respect to a holding tube of the arrangement. An adjusting ring is coaxially mounted with respect to the holding tube and rotatable relative thereto. An angular displacement of the adjusting ring relative to the holding tube effects via cam means an axial adjustment of the objective lens for the purpose of focusing it.

Abstract: A holding frame holds a microfiche. Guide rails mount the holding frame on the microfilm reader housing for movement along two perpendicular coordinate axes for moving selected portions of the microfiche held by the frame into position to be projected. An arresting device arrests the frame in selected positions and includes a stationary clamped structure on the housing and a cooperating releasable clamping structure on the frame. The clamping structure when not released clamps the clamped structure and thereby arrests the frame relative to the housing.