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Message: <blockquote data-quote="etudiant" data-source="post: 1724295" data-attributes="member: 48052">Ronald, Have not had any trouble with them in the wet, either Peru (warm rain) or Ireland (less warm rain).Only glitch was that when cold, the clear filters I placed over the oculars proved useless, as they fogged up.Once these were removed, the glass worked fine wet, even though its lenses are not LotuTech coated. I don't know if Canon has added that feature to the current production. Mine are 3 years old.The binocs are decent in the dark, simply because they are very bright, despite the internal 37mm field stop. Still, I have no basis for comparing  other than that they are noticeably in low light than my Zeiss 8x30 Classics.I've not taken them owling. at dusk, but can say they serve very well for astronomy, while also building your biceps as long as you can stand it. My guess is that while they are about as heavy and bulky as your 18x50, you're probably inured to that disadvantage. I'm certainly very happy with them and frankly somewhat surprised by their modest acceptance, especially as here in NY they are half the cost of a Zeiss FL. Best kept secret in birding optics, imo.</blockquote>