Took my Swarovski 8.5x42 on a trip and the whole day, in fact last several days are so humid and hazy that the picture doesn't appear right, it's hard to punch through the haze, especially long-distance. I even thought there was something wrong with binoculars, they looked more clear last winter and spring.
Does lower power work better on hazy days?
Filtering out some of the blue light (the wavelengths most easily scattered) with a yellow or other warm-colored filter often helps.
--AP
In patchy fog, you can see through a few areas, and there you need binoculars that work well in twilight as the sunlight is not getting through on those days. May need to wipe the bins if condensate forms.
Other haze may be difficult wo deal with, pollution etc.