I've just bought my first camera and like it!but need help. The saphire lens what chemical should i be aware of that could damage the lens? Clobber liquid plumber,bleach, lime, and sometimes the homeowner forgets to tell you if someone put something in the drain, so can damage lens be fixed? or have to be sent off to factory, and so how much. My next question is can a camcorder be plugged in and used to record or do you have to take a vcr out in the field? thank you Donnie J.