6/14/2023 0 Comments Scope parallax![]() If you always make sure your eye is dead centre (you have a perfectly symmetrical dark ring around the crosshairs) then parallax doesn’t matter. The figures on the ring may, or may not, be accurate and you won’t know without doing the above test at various known distances. Most ‘scopes are adjusted to be parallax free at about 100 yards (or metres) but some have parallax adjustment at the object glass (the end furthest from the eye). If the crosshairs move on the target when you move your head up and down or side to side, then you have parallax at the range of that particular target. To check if your rifle scope has parallax, fix the rifle in some sort of clamp. (Read our review of thermal imaging scopes.) Checking for parallax With high magnification scopes parallax error is particularly acute. It affects all scopes, but many have a parallax adjuster that focuses the scope at one range and aids accuracy. This is when the target image does not fall in the same optical plane as the reticle. However error in parallax can and does occur. ![]() In rifle shooting, the light transmitted through a telescopic sight will bend as it passes through the various lenses unless (a) they are perfectly ground and (b) your eye is dead centre in the optic lens. It’s why a fish or a stone under water will appear closer to you than it really is. What is parallax and how can it affect your rifle shooting? Parallax is caused by light bending as it passes from one medium to another.
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