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This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.
A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object. The most common form of laser rangefinder operates on the time of flight principle by sending a laser pulse in a narrow beam towards the object and measuring the time taken by the pulse to be reflected off the ...
Eyepiece image of a naval rangefinder, showing the displaced image when not yet adjusted for range. The coincidence rangefinder uses a single eyepiece. Light from the target enters the rangefinder through two windows located at either end of the instrument. At either side the incident beam is reflected to the center of the optical bar by a ...
Prominent refers to two distinct lines of rangefinder cameras made by Voigtländer.. The first Prominent, stylized in all-caps as PROMINENT and also known as the Prominent 6×9 to distinguish it from the later camera line, was a folding, fixed-lens rangefinder camera that used 120 film and was first marketed in 1932.
Early in World War II, the range to the target was measured by optical rangefinders. Though some night operations were conducted using searchlights and star shells, in general optical rangefinders were limited to daytime operation. [10] During the latter part of World War II, radar was used to determine the range to the target.
5-inch (127 mm) gun on the Fletcher-class destroyer USS David W. Taylor. Stabilizing signals from the Stable Element kept the optical sight telescopes, rangefinder, and radar antenna free from the effects of deck tilt. The signal that kept the rangefinder's axis horizontal was called "crosslevel"; elevation stabilization was called simply "level".
There were versions of the FED-5: the original FED-5 had an exposure meter, the FED-5B was a cheaper version without meter and the later FED-5C had reflected framelines showing field of view of 50mm lens and an exposure meter. All FED-5 cameras were delivered with an Industar I-61L/D lens. Production of FED rangefinder cameras ended in the mid ...
The successors of the R-D1s, the R-D1x and R-D1xG [2] [3] were made available from 9 April 2009 in Japan only. They feature very similar feature set except for few modifications: Larger 2.5" LCD display (vs 2" in the previous model) but with the same resolution - 235K; LCD is no longer articulated and cannot be closed