Sights with duplex reticle

Duplex

— hunting grade reticles for optical and night sights (see "Type"). The duplex looks like a classic crosshair with different thicknesses of lines: they are thin in the centre, and noticeably thicker near the edges. The meaning of this combination is that thin lines do not “clutter up” the field of view at the aiming point, and thick lines remain visible even under adverse conditions (for example, at dusk) and allow you to aim at least approximately. In addition, the thickness of large lines and the distance between their edges can correspond to well-defined angles, which gives certain possibilities for measuring distances and taking corrections. However, duplexes are not intended for high-precision long-range shooting.