Sorry just posted this in the comments, I used the om-5 in a blast freezer at -36º F for multiple 5 minute stints. When exiting the freezer to an ambient temp of 50º F, condensation on the camera would turn to Ice. I used insulated bags to let the camera temp equalize. It worked great the weather sealing is a real plus. I had a Nikon 200 sensor fail under the same conditions.
I have used the camera on two dive trips. Housed in the Nauticam with a 12-50 kit lens. Very nice results. One can assign a button function to shift the focal length from the 12mm wide end to the 50mm position. With a +4 diopter one can go from wide to macro with the same lens. Used this lens with the 6 in dome for the 7-14 pan.
Here are some photos. The only issue is the led on the moisture alarm is dead, but I will replace. The housing has never been flooded. Its been soaked after every dive and I lub the push buttons after every trip.