POI shift as magnification changes, is only something that happens with poorly made scopes.As usual they ‚forgot‘ to mention the little technical quirk with SFP.
It can loose its POI when the magnification ring is operated.
Think what rider was getting at is the fact as mag is increased or decreased the reticle hash marks/Mil dots have different spacing values on a SFP scope as opposed to being the same values/spacing s on a FFP scope
While this is true, I'm not sure how it can be an interpretation of that Rider said. Way back when, when FFP was the standard on high-end Euro scopes and everything Japanese and American was SFP, the Euro brands used to make a thing about the superior consistency of the FFP format, but as Bruce says, you had to have a really bad SFP scope for that to be a reality.Think what rider was getting at is the fact as mag is increased or decreased the reticle hash marks/Mil dots have different spacing values on a SFP scope as opposed to being the same values/spacing s on a FFP scope
Do you have a Swaro? Ask them durectly snd they will tell you that 1.5 cm at 100m are possible and considered as normal.
The impact shift happens in cheap glass. I have seen it many times. It is almost an internal parallax error. The better the scope, the less it happens. A $50 scope from WalMart is more likely to exhibit this than a $600 Leupold.Well when I meet someone who can demonstrate the theoretical point of impact shift of a SFP scope when mag is changed I will change my mind on usage