Both have side focus. Leupold is 3-15x44 NF is 2-10x42 Both are right at 20oz (this is for a “lightweight” mountain “elk” hunting rifle, so weight is key!) Leupold has zero locking elevation turret, NF is capped Both are right around 900.00 Leupold wins on paper in almost every category, so why would I consider the NF. Well, I have first hand experience with the ruggedness/durability of the NF in the mountains, and have first hand experience of their highly repeatable and reliable tracking. I don’t have either with Leupold (I don’t own any currently). I have seen NF dropped hard and never lose zero, I have cranked on the dials all day and never have a tracking issue. If I thought that VX5 would offer the same, I wouldn’t hesitate to go with it for the extra mag range and zero locking turret. What does everyone think?