Abstract: An apparatus for the exposure of additional information into the film plane of a camera, is located in a data back. The data back has a two-column liquid crystal display. Control of the data back takes place directly through the printer output of a computer. The data to be exposed can be entered for this purpose by means of the computer keyboard. The computer is simultaneously connected via the printer output to the code transducer and to the path measuring system of the zoom system of the photomicroscope. The overall magnification is calculated from the data which is read in, by means of a computer program, and is exposed in the photograph by means of the data back.

Abstract: The invention relates to a stereoscopic recording and display system, preferably having an autostereoscopic display system, wherein the position of the observer (especially the distance of the observer from the display system) is determined with a head tracking system and the convergence angle between the two cameras of the recording system is changed in dependence upon the distance of the observer from the display system in such a manner that, for an approach of the observer toward the system, the optical axes of both cameras are greatly convergent and, for a distancing of the observer from the display, the optical axes of both cameras are only slightly convergent. Simultaneously, the cameras are always focussed onto the intercept point of the optical axes of both cameras.

Abstract: Before the exposure of a film, the brightness of the miscroscope image is determined with a sensor by multiple constant (.tau.) which characterizes the dependence of the microscope image with time is determined. The film is subsequently exposed for a single exposure time (D.sub.c) which takes into account the dependence with time of the microscope image. The process is particularly suitable for microphotography of fluorescence pictures with fluorescence which bleaches out (fading). By the display of both the time constant (.tau.) and also the required exposure time, it can be estimated in advance, before exposure of the film, whether the dependence of the fluorescence on time permits microphotography with a sufficient exposure of the film, in the microscope conditions which have been set. A multiple exposure of the film is not required.

Abstract: A photomicroscope includes a port for a still camera (11) and an additional video camera (14). The video image of the video camera (14) serves both for the operation of a passive autofocusing system (23, 24) and for the determination of the exposure time for the still camera (11). The image areas that are used for exposure metering can be selected via a control panel (27). The integration time of the video camera (14) can be varied up to the range of minutes. The selected image areas are superimposed on the object image.

Abstract: A sensor for determining image brightness in the viewing-ray path of a microscope is so utilized as (1) to control the intensity of light for object illumination and (2) to black out or darken the viewing-ray path while switching optical elements such as from one to a selected other of a plurality of turret-mounted objective lenses. The arrangement assures that an observer will not be dazzled by sudden brightness in the course of lens switching or in the course of switching from use of one to use of another of a plurality of contrasting methods.