Optical Sighting Scope & Night Vision Device

Know Your Scope, How does the optical sight parallax return to zero ? 

An optical sight is designed to provide a clear and accurate view of the target, and one of the factors that can affect this accuracy is parallax error. Parallax occurs when the image of the target appears to move relative to the reticle (crosshairs) in the scope when the shooter moves their eye position. This can result in aiming errors, especially at longer distances.

To return the optical sight parallax to zero, you need to adjust the scope's parallax adjustment knob or turret. The parallax adjustment knob or turret is usually located on the left-hand side of the scope or integrated with the elevation turret. It allows you to adjust the scope's focal point so that the reticle is always in the same focal plane as the target, regardless of your eye position.

To adjust the parallax, first, locate the knob or turret and set it to the desired distance or range. Then, while looking through the scope, move your head up and down and left to right. If there is no parallax error, the reticle should remain fixed on the target. If there is a parallax error, adjust the knob or turret until the reticle remains fixed on the target, regardless of your head movement.

It's essential to adjust the parallax for the specific distance or range you're shooting at. Failing to do so could result in parallax error and inaccurate shots. It's also important to note that some scopes may not have a parallax adjustment feature, especially lower-end models, and may require you to be extra careful in your head placement to avoid parallax errors.