This thread has become more complex than it needs to be. The Slugmaster is a great scope for your shotgun. It is bright and clear and does everything you need it to out to 150 yards. I have one as do two of my friends and I have never heard a complaint from them or anyone else for that matter. I also have a Leupold VX-I on another slug gun and a Zeiss Conquest on a muzzleloader. They too are great scopes, but not really necessary as the Nikon Slugmaster (while maybe not quite as good) is more than sufficient. In fact, I like it better than the Leupold personally. The rest of the technical jargon is fun to throw around in deer camp, but in most cases won't help you shoot your next deer.