hoppas du kan Engelska
5.1. What is
Parallax?
Parallax is the apparent movement of the target relative to the reticle when moving your
head up and down, while looking through the eyepiece of the scope. It occurs when the
target does not fall on the same plane as the reticle. To eliminate
parallax, certain scopes
have an adjustable objective lens or side-focus dial. The shooter adjusts the front or side
mechanism whilst looking at both the reticle and the target. When both the reticle and
target are in sharp focus, with the scope set on its highest magnification, the scope is said
to be free of
parallax. That is the definition of
parallax from a firearms point of view,
where most shooting is done over 100 yards and the depth-of-field is deep.
Airgun shooting is a rather different affair. When using a riflescope of substantial
magnification at relatively close range (under 75 yards), the scope image will be out of
focus (blurred) at any range other than that which it is currently set. This means that to
have a usable sight picture, the objective or side focus has to be adjusted for each different
distance you wish to shoot.