I was at the beach last week and took my camera up to the ocean to take some shots. The camera and lens were in AC (in the car driving down to the beach, 6 hour trip) and when I got to my parents’ house I took it out and started snapping pictures with the EF-S18-55mm kit lens. After about 5 minutes I noticed the outer lens was fogging over. It wasn’t a “hot” day, about 82 but as always it’s humid at the beach. I used my cleaning cloth and once the lens warmed up it stopped. After that the inner lens fogged over and of course I couldn't clean it. It never did “unfog” while I was walking around for about an hour.
Question - did the moisture damage the lens in any way? I used it again later and it was working just fine. I have an EF 75-300mm zoom and this did not happen to it (Internal fog, the outer lens did fog but went away as described above). Why would one lens fog internally and another not? Also, how do you professionals keep this from occurring?
Thanks
John
