9/20/2023 0 Comments Scope parallaxScope parallax is an inconsistency in the view that you see when you look down the rifle scope. One of the variables that can affect your rifle’s consistency is rifle scope parallax. There is nothing unusual if these values do not correspond well with the actual target distances.As we spoke about in our blog “the difference between accuracy and precision”, the most important thing about rifle shooting at long range is consistency and predictability. If it does, parallax adjustment must be fine-tuned until the reticle is still, even if the eye of the shooter is moving around the optical axis.ĭo not mind the meters or yards written on the adjustable objective, since they only provide an approximate value. If the rifle is properly supported and fixed, the reticle should not move on the target when the eye is moved from the optical axis. When the target is in focus and the image offers the best sharpness, move the eye from the optical axis to any direction. The easiest way to correctly set the parallax is to look at the target and gently rotate the ring on the side focus. Due to the size of the internal mechanism for side focus adjustment, the majority of such scopes have a tube diameter of 30mm or more. Scopes, which offer parallax adjustment with a side focus, are usually bigger and heavier than counterparts with parallax adjustment on Adjustable Objective. Due to this reason, such scopes are usually used on tactical scopes and similar, where parallax is adjusted before each shot and distances to the targets change rapidly. Such an approach offers easy adjustment of the parallax in the prone position and is the best solution for situations when parallax must be adjusted often. With SF – Side focus scopes, parallax is adjusted with a rotation of the turret on left side of the main tube. Such scopes usually have AO – Adjustable Objective or SF – Side focus acronym in their name. The shooter, however, has to adjust the parallax setting before making the first shot. With the ability of parallax adjustment, the accuracy of the riflescope is greatly enhanced at all distances. Parallax errors become more pronounced with magnifications higher than 12x, and that means the majority of scopes with magnification range under this value need no parallax adjustment. For sport shooting, though, such small error leads to poor results. Since these errors are small, the fixed parallax option is still considered accurate enough for traditional hunting. If the eye is moved away from the optical axis, the reticle on the target will move, which will worsen the accuracy. An even bigger problem with this type of scope was the fact that, when shooting at the target, not at the same distance as the scope parallax setting, the shooter had to be very careful about his eye alignment with the optical axis. At all other distances, the picture was less sharp or even blurry. Scopes with fixed parallax offered the best resolution only at one distance (100 meters/yards) at which the target was in focus. Traditionally, rifle scopes had a fixed parallax set at 100 meters or 100 yards however, with the advance of shooting sports, such an approach was not adequate anymore. Tangent Theta Professional Marksman (4).
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