Elementary optics and applications to fire control instruments (1922)
United States. Army. Ordnance Dept · Washington, Govt. Print. Off. · leaf 64
B … D Fig. 62.—Types of reticule designs. vals of the horizontal scale are 10 mils each. The vertical scale is aninverted copy of the scale on the rear musket sight. The reticuleshown at F bears an entire range scale and is used in the telescopicsight for tank guns. The numbers refer to range in…
Optics · Optical instruments · Fire control (Gunnery) -- Optical equipment
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