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A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
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G3 X is the only superzoom model in the G-series. It offers a 25x zoom (24–600 mm equivalent) with aperture f/2.8-5.6. It offers an alternative to the Canon Powershot SX-series cameras with much better image quality. Because of the lens, the camera is much larger than other G-series cameras - weighing 739 grams.
Zeiss lenses for V system cameras can be divided into several series: [14]: 87 C (1957): in-lens Compur shutter; early lenses are finished in matt chrome (until 1972), while later lenses are finished in black; T* multicoating launched in 1973 and implemented system-wide by 1974. [15]
Early "S" lenses may have gold "S" stickers on them, while later "S" lenses may have the "S" engraved. "S" lenses may also be called "CS" lenses. [1] SF — the lens has a separate control ring to create a Soft Focus effect. [13] ULD — the lens has “ultra low dispersion” glass in its design [1] Zoom — the lens has a variable focal ...
However, for the record: the first autofocus lens for a still camera was the Konishiroku Konica Hexanon 38mm f/2.8 [171] built into the Konica C35 AF (1977, Japan) 35mm point-and-shoot; the first autofocus lens for an SLR camera was the unnamed 116mm f/8 [172] built into the Polaroid SX-70 Sonar (1978, USA) instant film SLR; the first ...
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