Leupold 6.5-20x40 EFR Scope

Leupold receives endless respect from precision shooters, because as difficult as they are to satisfy, their praise and patronage makes Leupold's efforts worthwhile. Leupold's stated goal is to make benchrest, target and long range target scopes as precise as the people who rely on them.
The 6.5-20x40 EFR and the compact 3-9x33 EFR provide for super-close airgun range focusing while retaining the ability to adjust for parallax out to infinity. A quote from the Leupold catalog on their philosophy says it all. It reads as follows:
A philosophy anchored in logic.
Hunters and shooters have unique expectations of Leupold that are simply not applied to other scope brands. This fact comes as a result of our most basic belief, which follows:
If a scope doesn't hold up in the field or on the range, then all other performance attributes are rendered completely meaningless. We build scopes that endure for generations. They're so reliably rugged, so completely waterproof, they're backed by the most rigorous consumer protection in the business. Indeed, these two characteristics are the heart and soul of every scope we make. In short, if you're looking for one of the toughest scopes made with fantastic optics, choose either of the Leupold EFR models. They have the toughness to handle all spring airguns.