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When using the eyepiece, the rubber cup surrounding the eyepiece must be depressed slightly to engage the display and cooling mechanism. The image displayed for the user is black and white. The user has the ability to select whether white or black will represent hotter objects by selecting "black hot" or "white hot".
The aperture cover itself has two 12 mm apertures that can be opened partially allowing the scope to be used in light conditions that would otherwise saturate the light intensifier. The rear end of the scope is a focus dial. The eyepiece has a detachable soft rubber eyecup. The scope has a magnification of 3.46.
The eye relief was only 38 mm (1.5 in), so the sight was equipped with a rubber eyepiece shield to prevent the scope from hitting the face during recoil. The reticle was a thin crosshair, as was common for this time period. [4] These sights were fitted to the Hotchkiss M1909 Benét–Mercié machine gun. [5]
The scope base is the attachment interface on the rifle's receiver, onto which the scope rings or scope mount are fixed. Early telescopic sights almost all have the rings that are fastened directly into tapped screw holes on the receiver, hence having no additional scope base other than the receiver top itself.
The first ACOG model, known as the TA01, was released in 1987. [3] [4] An example was tested on the Stoner 93 in the early 1990s by the Royal Thai Armed Forces. [5]In 1995, United States Special Operations Command selected the 4×32 TA01 as the official scope for the M4 carbine and purchased 12,000 units from Trijicon. [6]
Focuser: Allows the user to adjust the focus by moving the eyepiece along the optical axis. Eyepiece : Performs the final focus correction before the light reaches the eye. Charge-coupled device (CCD) : A light-sensitive integrated circuit digital sensor (commonly used in digital cameras) that turns light into an electrical charge used to ...
Tasco offers several spotting scopes. These scopes are designed for rugged outdoor use and feature rubber armor protection as well as optional camouflage. Models have magnifications between 12 and 45 times, and feature panoramic view finding. [8]
A reticle, or reticule [1] [2] also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections.