Re: know vx3 4.5-14x40 long range parallax setting ?
Rong,
Yes, they can, or so I've been told. But there is a rub: the infinity setting would now be max'ed out @ 200 yds.
I presume your intended use is for a 22 lr? If so Leupold does make scope for that purpose called EFR's for extended focus range.
In any event call Leupold and ask them.
Bob