Nikon cameras and lenses are waterproof and dustproof

It has nothing to do with electronics. As long as water enters, circuits and machinery cannot stand it. For example, Olympus, the most electronic SLR system on the market, is waterproof with "splash proof", so it can be used buried in the snow, and it will be fine even if you get soaked in heavy rain.

I remember that in D3, the official guideline was 5 minutes of light rain. 1DS MARK II is not that waterproof. If there is such a demonstration, it will damage the camera.

Note that both Nikon and Canon’s waterproofing is “moisture resistant”. The accurate translation should be waterproof vapor, which means that it can also be used in humid outdoor air in a high-humidity environment such as rainy days. No. Said you can get wet in the rain. Compared with Olympus, both are translated as "waterproof", but the actual meaning is completely different.

So, look at the cameras on the sidelines on a rainy day. Which one is not covered by a waterproof cover? In fact, if you need to use it in the rain every day, just put it in a plastic bag.