I have owned my share of leupold optics over the years. I have never had one fail to perform in any of the hunting and shooting extremes I have subjected them to. I just finished a British Columbia horseback moose hunt this year. It was a hunt I had always dreamed of getting to do. So you bet a Leupold Scope was on my rifle. From bush plane, bumps and bangs on horseback to rain. No loss in zero, no fogging! This is why I buy Leupold! Keep up the great work, Jim Wise