Marksmen can be trained to compensate for these errors. Inevitable BDC-induced errors will occur if the environmental and meteorological circumstances deviate from the circumstances the BDC was calibrated for. The BDC feature must be tuned at the factory for the particular ballistic trajectory of a particular combination of rifle and cartridge at a predefined air density. At longer distances the shooter must use the chevrons that would shift the trajectory by 100 metres (109 yd) per each chevron. The PSO-1 elevation turret features bullet drop compensation (BDC) in 50 metres (55 yd) or 100 metres (109 yd) increments for engaging point and area targets at ranges from 100 metres (109 yd) up to 1,000 metres (1,094 yd). The positioning of the scope's body to the left of the bore's center line may not be comfortable to all shooters.īullet drop compensation elevation turret Modern fixed magnification military high-end-grade sniper telescopic sights scopes intended for long-range shooting usually offer one or both of these features. Most modern military tactical scopes with lower power fixed magnification such as the ACOG, C79 optical sight or SUSAT (intended for rapid close-intermediate range shots rather than long-range sniping) lack such features as well. The PSO-1 has neither a focus adjustment nor a parallax compensation control. Ĭonsidered the higher end of Soviet military side-mount telescopic sights, the quality of the PSO-1 is higher than most other PSO-style telescopic sights.
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. The scope body is sealed and filled with nitrogen, which prevents fogging of optics and was designed to function within a -50 ☌ to 50 ☌ temperature range. It features professionally ground, fully multi-coated optical elements, a baked enamel finish for scratch protection, and an attached, quick-deployable, extendable sunshade. The PSO-1 features a battery-powered red illuminated reticle with light provided by a simple diode bulb. The metal body of the PSO-1 is made from a magnesium alloy. This telescopic sight is different from the original PSO-1 only in that it lacks the now obsolete infrared detector, which was used to detect generation-zero active-infrared night vision devices like the US M2 Sniperscope. The current version of the sight is the PSO-1M2. The PSO-1 was specifically designed for the SVD as a telescopic sight for military designated marksman activities. 1.1 Bullet drop compensation elevation turret.
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