rifle scope basics Archives - Precision Arsenal

What Is Eye Relief on a Scope? How Much You Need and How to Set It

October 21, 2026 by Reto Wyss

Close-up of a precision rifle scope eyepiece, the lens end where eye relief is measured

Eye relief is the distance between your eye and a scope’s rear lens at which you see the full image. Here is how much different scope types offer, why it shrinks at high magnification, and how to set it on your rifle.

What Is Parallax Adjustment on a Scope? How It Works and When to Use It

October 17, 2026 by Reto Wyss

Close-up of a precision rifle scope showing its turrets and side focus knob, illustrating parallax adjustment

Parallax adjustment moves the target image onto the reticle’s focal plane so the crosshair stays put when your eye shifts. Here is how it works, how to set it in the right order, and when a fixed-parallax scope is enough.