volume 55, issue 1, P123-131 2009
DOI: 10.1111/j.1755-3768.1977.tb06101.x
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BO BENGTSSON, C. E. T. KRAKAU

Abstract: The imaging system of the Zeiss fundus camera comprises a front lens and a mirror with a central opening in the anterior focus of a camera objective. Focusing is achieved by changing the distance between the film and the camera objective. The principal point of the examined eye is imaged in the central opening of the mirror when the camera is correctly positioned. By applying reasoning current in elementary geometrical optics it was found 1) that both the absolute and the relative magnification depend on the "…

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