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The AN6531 Comfort Cable aviator sunglasses frame kept being issued by the U.S. military as No. MIL-G-6250 glasses after World War II with different lenses as Type F-2 (arctic) and Type G-2 aviator sunglasses but fitted with darker lenses until their substitute the Type HGU-4/P aviator sunglasses became available in the late 1950s.
The prototype, created in 1936 and known as "Anti-Glare", had plastic frames and green lenses that could cut out the glare without obscuring vision. The name "Ray-Ban" was hence derived from the ability of these glasses to limit the ingress of either ultra-violet or infra-red rays of light. [7] Impact-resistant lenses were added in 1938. [8]
Diagram illustrating the flange focal length of an SLR–type and a mirrorless–type camera. For an interchangeable lens camera, the flange focal distance (FFD) (also known as the flange-to-film distance, flange focal depth, flange back distance (FBD), flange focal length (FFL), back focus [1] or register, depending on the usage and source) of a lens mount system is the distance from the ...
With its maximum aperture over its zoom range being F2.8-5.8, and with its sensor smaller than Canon APS-C sensor, the G1 X camera-lens system can be compared to the APS-C DSLRs using the Canon EF-S 18-55 mm f/3.5-5.6 IS II SLR Kit Lens: the G1 X is a little faster (wider aperture) at the wide angle and comparable thereafter, but with a longer ...
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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]
The fixed rate for a 15-year mortgage is 5.99%, down 1 basis point from last week's average 6.00%. These figures are lower than a year ago, when rates averaged 7.44% for a 30-year term and 6.76% ...
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 ...