I have a Nikon 600, which is a pretty good rangefinder, but the 600 (in my view) means that it'll read to 600 yards under ideal conditions. It'll occasionally read out to 500, which is enough for most folks, but I'd like more. I had a coyote in view the other evening, with him at a slow walk in an adjacent pasture of mine. It was at dusk, looking west, and I knew he was over 300 yards out, but could NOT get the Nikon to read him. Finally I got a range of 359. So next time I'll get one that reads to a max of at least 800. A Leica would be nice, but that's probably overkill for my needs.