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New shooters are often explained the principle of subtensions in order to understand that a milliradian is an angular measurement. Subtension is the physical amount of space covered by an angle and varies with distance. Thus, the subtension corresponding to a mrad (either in an mrad reticle or in mrad adjustments) varies with range.
Sights that use dot reticles are almost invariably measured in minutes of arc, sometimes called "minutes of angle" or "moa". Moa is a convenient measure for shooters using Imperial or US customary units , since 1 moa subtends approximately 1 in (25 mm) at a distance of 100 yd (91 m), which makes moa a convenient unit to use in ballistics ...
Red dots for rifles typically have a smaller dot, often 0.6 to 0.8 mrad (2 to 3 MOA). When red dot sights started to appear at the practical shooting competition circuit in the 1990s, reticle sizes of up to 3, 4.5 or even 6 mrad (10, 15 or 20 MOA) were common in order to compensate for the lack of bright illumination. However, as red dot ...
An alternative variant uses perpendicular hash lines instead of dots, and is known as the mil-hash reticle. Such graduated reticles, along with those with MOA-based increments, are collectively and unofficially called "milling reticles", and have gained significant acceptance in NATO and other military and law enforcement organizations.
For zeroing the telescopic sight the reticle can be adjusted by manipulating the elevation and windage turrets in 5 centimetres (2.0 in) at 100 metres (109 yd) (0.5 mil or 1.72 MOA) increments. [ 2 ] Considered the higher end of Soviet military side-mount telescopic sights, the quality of the PSO-1 is higher than most other PSO-style telescopic ...
To adjust a 1 ⁄ 4 MOA scope 3 MOA down and 1.5 MOA right, the scope needs to be adjusted 3 x 4 = 12 clicks down and 1.5 × 4 = 6 clicks right; To adjust a 1 ⁄ 8 MOA scope 3 MOA down and 1.5 MOA right, the scope needs to be adjusted 3 x 8 = 24 clicks down and 1.5 × 8 = 12 clicks right; Comparison of minute of arc (MOA) and milliradian (mrad).
Reticle of Bell & Howell Pocket Comparator Reticle accessory (PD-8) used in sniper rifles 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 ...
The optical window in a holographic weapon sight looks like a piece of clear glass with an illuminated reticle in the middle. The aiming reticle can be an infinitely small dot whose perceived size is given by the acuity of the eye. For someone with 20/20 vision, it is about 1 minute of arc (0.3 mrad). [citation needed]