I bought a pair of these primarily for spring turkey hunting in S. Texas. Encountered light rain the first day out. Kept the binoculars tucked inside my shirt, but they still fogged up almost immediately and were totally useless. A pair of lower priced 10X50 Simmons my wife was using never fogged and worked perfectly. Nikons were obviously not properly vacuum sealed, but when I contacted Nikon they refused to honor their 25-year warranty, even though the binoculars were brand new. A company contact said they were not guaranteed to be "water proof." I consider water proof to be submersible; not something that won't stand up to a couple of hours of humidity and light rain. I had always wanted a pair of Nikons, based on the company's reputation. Now, I will never buy anything from Nikon, and strongly advise others to avoid buying from them as well. The product proved to be shoddy, and the company's warranty was worthless. Know if you do buy them that the company refuses to stand behind its product. I rated them poorly in every catagory because they were not useable even once. FYI, I have been hunting and engaged in other outdoor activities for more than 40 years, and have never experienced this kind of problem with any other binoculars I have ever used. I am also a professional sports and outdoors writer, and in the course of testing many products I have never come across one which performed so poorly, or dealt with a company that showed such total disregard for its customers' interests.