I have a pair of bushnell compacts that also aren't waterproof, they've been fine and have seen moisture in the way of rain and snow. Old school bins weren't all waterproof and also have functioned fine through some moisture. Even with my field bins which are waterproof, I protect from the pouring rain..habit I guess. For your situation I don't think you'll have a problem and you found the optical performance better. Any way you slice it you'll have some gosh/darn thoughts.