Parallax vs. focus: no big deal to hunters, but target shooters need to know how to use this tool.(OPTICS)

Guns Magazine | January 1, 2008| | Copyright

In the shooting world, accuracy and precision are not always synonymous terms. Hitting a deer in the kill zone at 100 yards might be described as an accurate shot because it was productive, though the point of impact might have been 5" from the point of intention.

Webster defines parallax as, "An apparent change in the direction of an object, caused by a change in the observational position that provides a new line of sight." This is exactly what happens to the crosshairs in a scope as viewed against an object at a distance if the riflescope has not been adjusted to ...

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