My Swaro 8.5x42 ELs have frozen solid on me, as has my ATM 65mm spotter. I couldn't adjust the focus on either or the bridge on the binos. That said, when functioning they're CRYSTAL clear, and won't strain your eyes at all.
When it gets really cold or rainy, I leave the ELs home and either take my 10X Zeiss or my 10X Steiner Peregrines instead. I will put up with the "reduced" clarity for the more reliable function.
Nonsense!
