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The two dials are ganged so that they focus together and they can be focused by turning either dial. [1] The right lens focus dial is marked with distances 4, 5, 6, 8, 10, 15, 25, 50, INF. [ 1 ] Behind this dial is an arrow pointing at the point of focus and red marks showing the range of sharp focus for 3.5, 5.6, (red dot) and 8. [ 1 ]
The Clavius method looks at a quarter of the dial. It views the horizontal and the perpendicular plane to the polar axis as two rectangles hinged around the top edge of both dials. the polar axis will be at φ degrees to the polar axis, and the hour lines will be equispaced on the polar plane an equatorial dial. (15°).
like II but with slow speeds on frontal dial * Leica 250: 1933–1946: 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 ...
There are four basic angles that are needed to construct a vertical declining dial, Waugh described them such: [2] SD- Sub-style distance - this is the angle on the dial plate between the foot of the style and the vertical noon line. SH- Sub-style height - this defines the slope of the style. It has no effect on the design of the dial plate.
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The resulting dials are now collectively known as radium dials. The luminous paint used on the dials contained a mixture of zinc sulfide activated with silver, and powdered radium, a product that the Radium Dial Company named Luma. However, unlike the US Radium Corporation, Radium Dial Company was specifically set up to only paint dials, and no ...
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