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Swarovski CL 8×25 binoculars. 1935 First Swarovski binoculars, which was a 6×30; 1949 Formation of Swarovski Optik; 1959 First Swarovski Optik rifle scope (4×32) 1967 First Swarovski Optik extendable spotting scope (30×75) 1974 Kahles was purchased by Swarovski Optik [3] 1977 Kahles became a branch of Swarovski Optik [3]
At 2 inches (5.1 cm) in diameter and 0.5 inches (13 mm) thick, both surfaces are flat to within 1/10 of the wavelength of the light (58.9 nm), as indicated by the perfectly straight fringes. An optical flat is an optical -grade piece of glass lapped and polished to be extremely flat on one or both sides, usually within a few tens of nanometres ...
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