I have the ATN 4k and am impressed with it at night. When I took it out and sighted in on my AK15 for hog hunting, I was really bummed at the clarity at the range. I was thinking about sending it back, but a couple of friends told me to try it at night first. I could see rabbits 200yds away on the fence line with cloud cover and the supplied illuminator. We were in a wooded area and it was to dark to walk without a head lamp, but I could see fine through the ATN. Just remember that depth perception is really bad at night. Just to add a bit, I have never been so jacked up after a hunt in my 59 years, when I could hear the pigs running behind me close enough to feel the ground moving, and knowing that their was a mountain Lion in the area! You could not wipe the smile from my face! I still want to get an ATN thermal, however.