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The Kodak Retina Reflex was a series of four single-lens reflex cameras made by Kodak, continuing the brand Kodak Retina. ==Retina Reflex== The Kodak Type 025 Retina Reflex is an SLR camera with so called convertible lenses (German: Satzobjektiv), interchangeable lens components made by Kodak AG Stuttgart, Germany. It was made between Spring 1957 and October 1958. Like many SLR cameras of German heritage it works with a leaf shutter instead of a focal plane shutter. It was named Type 025 Retina Reflex since it inherited several features from the viewfinder camera Type 021 Retina IIIc: The film advance and exposure counting system, the film channel, the selenium meter, and the focusing mechanics of the lenses. Even the Synchro-Compur shutter is very similar to that of the viewfinder camera. The Retina reflex is basically a fixed-lens camera rear except for one aspect - the front three elements are contained in a cell that bayonets into the front of the lens assembly. The standard front cell can be replaced with one of three Schneider components - an 80mm and two different 35mm components. The rear part of the lens (which is a permanent part of the camera body) contains the focusing apparatus, the entire Synchro-Compur shutter, the aperture, and the three rear elements, which are common to all 4 lenses. This interchangeable front component concept was introduced in 1954 with the Kodak Retina IIIc. Care must be exercised when using front components other than the standard (50mm) one, as it is possible to set the body mounted aperture wider than the maximum aperture of the lens (i.e. f/2 instead of f/4 or f/5.6). A similar system was introduced in 1956 with the Zeiss-Ikon Contaflex III. The Retina Reflex is, rare occasions, found with very similar lenses made by Rodenstock. As the Rodenstock front components are not compatible with the Schneider rear component (and vice versa), minor changes were made to the bayonet mount for each manufacturer. These interchangeable Retina lens components can also be used on the Retina IIc, IIC, IIIc, and IIIC rangefinder cameras. The camera offers the convenience of image composition with wide open aperture. The aperture is stopped down to the selected value after the shutter is released. After exposure the mirror stays up until the bottom-mounted single-stroke film advance lever is again wound. Focusing is via a ground glass screen with a central split-image rangefinder. The camera's top plate has the manually set frame counter, the shutter release, the film rewind knob with film reminder dial, the exposure needle window, meter adjustment knob with EV and ASA/DIN scales, the film (advance) release button, the frame (counter) advance slider, and the accessory shoe. The bottom plate contains the tripod socket, the film advance lever, the back release latch, and the film rewind release button. In use, the Retina Reflex frame counter works down from 35 (or 20) to 0, at which point the film advance locks. While this is convenient for the user and does prevent torn film sprockets at the end of a roll, setting the counter up properly at the beginning of a roll is complex, awkward, and time consuming. This is a typical example of much of Retina engineering - complex and ingenious, but perhaps over-engineered. The non-coupled selenium cell exposure meter reads out in exposure values (EVs) only. The camera is then set to the proper EV setting via an easily reached aperture release tab, though the EV scale itself is rather inconveniently located on the underside of the lens assembly. Once the aperture release tab is set and released, the shutter ring is coupled to the aperture ring - moving the shutter ring automatically moves the aperture ring, so that the same exposure value is maintained. In other words, when in use, the camera is normally locked into one EV setting until the aperture release tab is pressed. Needless to say this can be confusing to those unfamiliar with the camera. All the Retina Reflex cameras are remarkably complex instruments and quite heavy for their size. The Retina Reflex originally sold for $215 USD〔History of Kodak Cameras at Kodak.com〕 (app. $1,820 USD in 2014). Approximately 65,000 were made. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kodak Retina Reflex」の詳細全文を読む スポンサード リンク
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