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The term stadia comes from a Greek unit of length Stadion (equal to 600 Greek feet, pous) which was the typical length of a sports stadium of the time. Stadiametric rangefinding is used for surveying and in the telescopic sights of firearms , artillery pieces , or tank guns , as well as some binoculars and other optics.
[citation needed] There are however military and shooting sport sights that use coarser or finer reticle increments. By means of a mathematical formula "[Target size] ÷ [Number of mil intervals] × 1000 = Distance", the user can easily calculate the distance to a target, as a 1-meter object is going to be exactly 1 milliradian at a 1000-meter ...
Typically, binoculars with a magnification of 8× to 10× are used, though many manufacturers produce models with 7× magnification for a wider field of view and increased depth of field. The other main consideration for birdwatching binoculars is the size of the objective that collects light.
A 100mm spotting scope with a paraxial 30mm finderscope. A spotting scope is a compact lightweight portable telescope optimized for detailed observation of distant objects. [1]
This undated photo released by the New York Police Department shows a suspect in the fatal shooting of UnitedHealthcare CEO Brian Thompson on Dec. 4, 2024, outside of a taxi. Part of the image was ...
Category for binoculars, the optical devices, often found in birdwatching. Pages in category "Binoculars" The following 7 pages are in this category, out of 7 total. ...
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