Originally posted by robr7 Only problem with this is I believe it was the reverse, I was out for hours coming in.
Condensation happens when cool metal or glass comes into contact with warm humid air.
This can happen if you are outside in the winter and go into a warm humid house. Or it can happen if you are in air conditioning and go out into warm humid air. If your camera was cooler than the air it was exposed to you will get condensation.
I suspect you are correct about your wife's P&S but also, there is far less glass involved with that little camera so it will adjust to ambient temperature much faster. So maybe it did fog, but was clear by the time she used it. That 16-50 is just one huge chunk of glass.
When I am out in the winter shooting I leave the camera bag in the garage for a few hours when I come in so that it gradually warms up before I go into the house which has a higher humidity.