Water vapor cooling causes that water vapor to condense.
All lenses are anti-fog coated to eliminate condensation.
Water vapor cooling causes lenses to fog.
What could cause lenses to fog?
Options:
1) energy of moving objects
2) Transpiration from plants
3) Water evaporating
4) heating liquids
5) Water vapor cooling
6) Ice sublimating
7) scattered light
8) The atmosphere