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  2. Half-frame camera - Wikipedia

    en.wikipedia.org/wiki/Half-frame_camera

    The 3:4 aspect ratio of half frame photos can easily be cropped to 4:5 in portrait orientation without a significant reduction in image quality producing an "Instagram ready" photo. This has been reinforced by Kodak's reintroduction of half frame cameras [9] through the Kodak Ektar branded H35 half frame camera.

  3. Ektar - Wikipedia

    en.wikipedia.org/wiki/Ektar

    Prior to its use on films, the Ektar name originally referred to Eastman Kodak's premium-priced lenses for professional use, which were introduced in 1936 and sold until the 1960s. In contrast to the branding from other lens-makers, Kodak emphasized that the name was a quality mark rather than referring to any particular optical formula. [3]

  4. Kodak Ektra - Wikipedia

    en.wikipedia.org/wiki/Kodak_Ektra

    The Kodak Ektra was a 35mm coupled rangefinder camera launched by Kodak USA in 1941. Originally regarded as one of the most innovative cameras of its type when first released, the Ektra featured the ability to cover both the highpoint and lowpoint of 35mm operation, but suffered from a faulty shutter.

  5. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

  6. LED lamp - Wikipedia

    en.wikipedia.org/wiki/LED_lamp

    A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

  7. 135 film - Wikipedia

    en.wikipedia.org/wiki/135_film

    135 film. The film is 35 mm (1.4 in) wide. Each image is 24×36 mm in the most common "small film" format (sometimes called "double-frame" for its relationship to the "single-frame" 35 mm movie format or full frame after the introduction of 135 sized digital sensors; confusingly, "full frame" was also used to describe the full gate of the movie format half the size).