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Leica III or IIIa with 250-image magazines (10 metres of film) Leica G (Leica IIIa) 1935–1940: adds 1/1000 speed: Leica IIIb: 1938–1940: Rangefinder and view windows closer together: Leica IIIc: 1940–1951: die-cast body, slightly longer, redesigned shutter featuring ball bearings: Leica IIId: 1940–1945: Very rare, only 427 were built ...
V Vision (unaided) VA Visual acuity VA Dcc - VA Dsc Visual acuity with Distant chart with correctors Visual acuity with eye chart at Distant 20 feet (6 m) and with (cc: Latin cum correctore) correctors (spectacles); Dsc is without (sc: Latin sine correctore) correctors. See Visual_acuity#Legal_definitions: VA Nsc - VA Ncc
The Leica II is a Barnack rangefinder camera introduced by Leica in 1932. They were the first Leica cameras with a built-in rangefinder. Several models were produced over the years, in parallel with the Leica III series from 1933. The Leica II uses a coupled rangefinder distinct from the viewfinder. The viewfinder is set for a 50 mm lens; use ...
An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1 ] Eye charts are often used by health care professionals, such as optometrists , physicians and nurses , to screen persons for vision impairment .
Leica 50 mm f /1.4 Summilux-R 3rd version – 1997 (ROM contacts) Leica 60 mm Macro-Elmarit-R 1st version – 1972 – outside bayonet lens hood fitting; Leica 60 mm Macro-Elmarit-R dn2 version; Leica 75 mm f /2.0 Elcan-R code C-341 – extremely rare; Leica 80mm f /1.4 Summilux-R; Elmarit-R 135 mm. Leica 90 mm f /2.8 Elmarit-R 1st version ...
The largest letter on an eye chart often represents an acuity of 6/60 (20/200), the value that is considered "legally blind" in the US. Many individuals with high myopia cannot read the large E without glasses, but can read the 6/6 (20/20) line or 6/4.5 (20/15) line with glasses. By contrast, legally blind individuals have a visual acuity of 6/ ...
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Followed by Leica Luxur and Leica Compur (a total of 60,586 of the Leica I, Luxur, and Compur models were made). Interchangeable lenses for these were introduced in 1930. Leica Standard: 1932. The first Leica camera was designed with a film-to-lens flange distance of 28.8 millimeters. Leica II: 1932. The first Leica camera with a rangefinder.