Having just read this entire thread, I have to say I've been well-educated by everyone on the topic of "water-resistant", "weather-resistant" vs "-proof", etc...
That said, I did believe the advertising over the years, including Pentax various water bottle demonstrations and our own contributor here who poured sand over his cameras, then rinsed them off under a running faucet. (what ever happened to him -- does he still contribute here? Can't think of his user name?)
So... one evening, I was out shooting a community event when a sudden storm blows up. You know, the kind that a hot afternoon on a humid day can create. Blue skies one minute, then suddenly gray, to black, to huge downpours. I didn't have an umbrella. No one expected rain. At the time, I was so fully confident of all the WR talk, I wasn't worried. I just continued to shoot with my K-30 and 60-250mm lens, which I believed at the time to be "weather-proof," even if that was a stretch on the company's own advertising.
I guess luck was with me that day. Despite an absolute downpour, and the fact that i continued to use my camera, which was soaked from rain in every direction as I moved the camera around, it suffered no damage that I could detect. I'd say the K-30 was in the rain for well over an hour.
Once I was finally able to get home, I thoroughly dried everything off, then separated the lens and camera, laying them out over and under fresh dry towels in my air conditioned home with low humidity for two days.
So, at the time I was convinced I owned a "very strongly water-resistant" camera and lens which was impervious to rain. I got those notions from Pentax advertising and trade show photos like those posted in this thread. Now I know much different, and I should exercise caution about the rain, rather than confidence. That's a sorta let-down after all these years.
Undoubtedly, someone will say that my earlier confidence was unjustified and that I was lucky. I agree. I suppose I was very lucky. Still, it's a let-down from feeling that there were no worries in whatever weather.
From memory, it seems there were other PF posts about water damage. But they were about the camera falling into a pond or the ocean, where the force of the splash and total submersion seemed to be the cause, rather than simple rainfall.
Thanks to the OP for the cautionary tale. Sorry that you lost your K3iii. That's quite a blow, no matter what.
Edit: Language from "archive", i.e., "the way-back machine" -- Ricoh's website on Oct 22, 2013: "fully weather sealed" vs "resists water..." So, there was a sort of dichotomy, wasn't there? "Fully sealed"?
I suppose to Ricoh/Pentax, that meant, "weather seals everywhere, but they may not be fully effective so the camera only 'resists' water, fog, snow, sand, dust and more for top performance in extreme conditions..."
"Top performance in extreme conditions...." vs "Keep your camera dry. It may be destroyed by rain or paddle water on a nice day." How is "extreme conditions" compatible with "keep your camera dry"?
Link here:
PENTAX - K-5 IIs