Well, smoke, if anybody tells you they are using a Leupold, Nikon, Zeiss, etc. rangefinders out to 1000 yards and getting accurate readings they are full of bull. Takes a lot of power from a LRF to read a soft target at that distance or the deer are wearing reflective targets. At a minimun a 2000 yard LRF would be needed, which none of the above noted LRF have that kind of power.
