I’ve had the same Leica 10x40 binocs for decades. Never felt the need to upgrade. Some years back I found I could see deer very clearly with the binocs that weren’t that visible in my Leupold Vari-X III 4.5-14. Last year I bought a new Leupold VX5 3-15x40 Firedot, and it seemed real bright, but I hadn't hunted with it much. A couple of afternoons ago I had a doe close by as the light was fading fast. I could see her just fine in the Leica binocs and decided to take her for the freezer. Picked up the rifle and put the scope on her (8 power) and I was honestly very surprised at how well I could see the deer. Much brighter than my decades old Leica binocs. I love those Leicas, but the new scope is brighter. No doubt. That has never happened with any other scope I have ever owned.