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Message: <blockquote data-quote="Hermann" data-source="post: 212584" data-attributes="member: 4925">I don't agree. I think that from an engineering point of view the Nikon with its wide focussing ring is more difficult to waterproof than the "knob focussing" of the Leica or the Zeiss. I also think this type of focussing is more prone to leaking no matter how good the sealing is, especially after a few years.That's why I'm a bit more careful with my Nikon EDIIIA in bad weather than I was with my Leica. But some commonsense and a decent stay-on case go a long way IMO. I've used my Nikon  in all sorts of weather with no ill effect, but I always make sure the focussing ring doesn't get waterlogged.BTW, when the EDII came onto the market here, Nikon claimed in their brochure that it was waterproof. It wasn't. My mother's EDII fogged up after a heavy thunderstorm during a seawatch. She didn't have a stay-on case at the time, and it seems like she drew some water into the scope by focussing. Nikon repaired the scope, and shortly afterwards the new brochures had a warning not to use the focussing in wet weather. I used an EDIIA with a home-made stay-on case at the time, and didn't have any problems. Hermann</blockquote>