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Idiots think rainwater is just like any other water...
>In both rain and dew water the mean average conductivity is low, EC ≈ 200 µS cm-1, corresponding to low total mineralization ≈ 0.77 EC =150 mg L-1 (dew and rain).
>Electrical conductivity is a measure of the saltiness of the water and is measured on a scale from 0 to 50,000 uS/cm. Electrical conductivity is measured in microsiemens per centimeter (uS/cm). Freshwater is usually between 0 and 1,500 uS/cm and typical sea water has a conductivity value of about 50,000 uS/cm.
Weather sealing is meant against rainwater you fucking dumbos. Even if rainwater gets past the gaskets (which it doesn't on Nikon or Olympus) it dries off before causing any corrosion. If you on the other hand decide to do a nude gay shooting in the ocean spray you can watch the corrosion happening in realtime. (dont belive me? look up a video by louis rossman where he shows saltwater corrosion in realtime)