Vortex fast focus feature

[Mark in Mo]

My question is, if you adjust the focus after sighting in (not the side parallax) will your point of impact change?

 

[kcebcj]

The eye focus is to get the reticle in focus to your eye. The parallax gets the view into focus and removes parallax. Neither changes impact settings.

 

[Mark in Mo]

I understand its purpose (focus the reticle) but I can wiggle it and the reticle moves so therefore if I adjust it I think my point of impact changes

 

[kcebcj]

I took mine outside and set it up in the bags and when I ran the eye focus all the way out I could get some movement out of it. I could not see enough movement in the reticle looking at a 100 yard target to concern me.

Now something I have done with mine is I made a spacer that fits between the eye focus and the scope tube the right thickness so I can run the eye focus down tight against it and the reticle is in focus and just now checking it there is zero movement. When I first started using the scope the eye focus kept running in when hiking and slinging the rifle so I made the spacer. Fixed it!

This scope gets banged around a lot and has never lost its zero. Good luck!