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Parallax is defined as an object appearing as if it is positioned differently when it is looked at from different angles or different positions.
Parallax can be defined appropriately to rifle scopes as the apparent movement of objects within the field of view in relation to the reticle. In a telescopic sight, parallax occurs when the âprimary imageâ of the object is formed either in front of, or behind the reticle.t is also important to know that in every scope, there is some one shooting distance at which there is no parallax. In most rifle scopes this one point of zero parallax is usually placed at a suitable mid-range point in the scopes' focal range. In lower-quality scopes, there are other sources of parallax.