I wouldn't rush to shout-out the praises of JVC camcorders just yet. They have consistently been rated the most unreliable brand available, while Panasonic and Sony tend to be the most reliable. And I don't know what you mean by dew detection. Most electronics have moisture 'tags' that change color if they have been exposed to moisture. The reason for this is that if you drop your camcorder in the lake and it stops working, the warranty will not cover it. To see what I am talking about look on any cell phone (in the battery area and also on the battery as well) to see one. It will probably be white or pink. The tag doesn't deactivate the device, the device got wet, failed, and the tag will tell the technician why.