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DE1206721B
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Device for controlling the focus of a taking lens by checking the image in a reflex viewfinder coupled to the lens
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DE1205822B
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Rangefinder with photoelectric cells for setting the aperture of a photo lens
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DE1256430B
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Pendulum device for measuring devices, especially for optical measuring devices
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DE1266516B
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Rangefinder
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DE1255946B
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Afocal intent system
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DE1198583B
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Afocal optical system with constantly changing magnification
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DE1097697B
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Optical rangefinder
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DE1045795B
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Reflex viewfinder connected to the lens of a photographic camera, in particular a cinema camera
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US2566485A
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Auxiliary optical device with variable magnifying power
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DE414640C
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transmission
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GB191331A
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An improved deviator for range-finders
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DE370333C
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Distance meter with two plane-parallel glass plates that can be rotated around the optical axis
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GB127800A
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Improved Apparatus for Rendering the True or Apparent Focal Length of Objectives Independent of Changes of Temperature.
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