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Variable-zoom telescopic sights in the low magnification range (1–4×, 1–6×, 1–8×, or even 1–10×) are known as low-power variable optics or LPVOs. These telescopic sights are often equipped with built-in reticle illumination and can be dialed down to 1× magnification.
A Trijicon 3.5x35 ACOG prism sight with a Trijicon RMR reflex sight mounted on the top.. A prism sight or prismatic sight, sometimes also called prism scope or prismatic scope, is a type of telescopic sight which uses a reflective prism for its image-erecting system, instead of the series of relay lenses found in traditional telescopic sights.
A C79 Optical Sight. The C79 optical sight (SpecterOS3.4x) is a telescopic sight manufactured by Elcan. A variant, the M145 Machine Gun Optic is in use by the US military. It is 3.4×28, meaning 3.4x magnification, and a 28mm diameter objective lens. A tritium illuminated reticle provides for normal and low-light conditions sighting. [1]
Zoom and superzoom lenses are commonly used with still, video, motion picture cameras, projectors, some binoculars, microscopes, telescopes, telescopic sights, and other optical instruments. In addition, the afocal part of a zoom lens can be used as a telescope of variable magnification to make an adjustable beam expander.
Simple animation demonstrating the effects of parallax compensation in telescopic sights, as the eye moves relative to the sight. In some reticled optical instruments such as telescopes , microscopes or in telescopic sights ("scopes") used on small arms and theodolites , parallax can create problems when the reticle is not coincident with the ...
The thermal imaging sensor within the sight requires a low temperature to operate, so a cool-down time of less than 2 minutes is required at startup. The AN/PAS-13B comes in two variants, the medium AN/PAS-13B(V)1 and the heavy AN/PAS-13B(V)2. The medium has a smaller telescope attached, resulting in a zoom of 5x compared to the heavy's 10x.