I received the NL Pure 8x42 at the end of December. Excited about the huge field of view, I was even more surprised by the increased image sharpness, immediately at the first view out of the kitchen on a piece of tree. With that, the decision was made: I'm buying these binoculars. I have good comparison, 10 binoculars from Leica, Zeiss, Optolyth and the El Swarovision 8.5x42 and 10x50.
I came only in January to take the NL outside at about 3°Celsius. But after looking through the bino for about 45 seconds, the eyepieces started to fog up until I had only mist in front of my eyes. This was a completely new experience for me in the last 25 years.
Explained physically, condensation occurs when my body heat radiates onto the cooled eyepieces. But that's why these lenses are coated with a moisture repellent coating. At Zeiss this is called "Lotu-tec" at Swarovski "Swaroclean", etc..
That's why I made a comparison: I took the new NL and my El 10x50 outdoors a few days later under similar external conditions, temperatures below 4°C. While the process described above repeated itself with the NL, I could look with the EL for 5 minutes continuously without any condensation. I also compared with my other binos several times with the same result. Another experiment is significant: I wetted the eyepieces of the NL and the EL with water and then shook off the water as much as possible. When I then looked for moisture residues, there were water beads on the EL and water puddles on the NL. This is a significance and not a one-time coincidence.
At first I assumed a defect in the coating of my NL until I found some posts on BirdForum that matched my findings. So a serial error??
Therefore my question to you: Has anyone found something like this? Of course with the eyepiece sleeves turned out. When used with glasses, the condensation can not occur because the lenses are hardly irradiated with heat and the air can circulate. I am very grateful for feedback you!!!
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