[Mallee Boy]

My experience with Pentax weather sealing / resistance is good. Shooting Motox in dust / mud / rain the camera never failed, and it (& me) came in covered in mud on more than one occasion and usually with a fine layer of dust over us...and I think the dust is the greater enemy.
Also came into play when caught in a storm on Grand Canyon North Rim, wiped it down immediately and kept shooting...and again in Antelope Canyon (lower) when another shower caught us by surprise, where it basically rained a very fine mud....we were just a little nervous being down there given the history, but the operators were quick to assure us all was well. Another person in that instance was using a canon something and was dismayed when it stopped working altogether after 10 minutes, another superzoom bridge stopped zooming. Sitting outside our motel back in Page washing the cameras down drew many comments.

[TER-OR]

My K5 has gotten pretty wet, there was a slight problem with the trigger but it resolved after a couple of days. The K3II hasn't become that soaked, but has been caught in a couple sprinkles. Make sure you clean the rubber gaskets occasionally on both lens and camera, you want those to stay in good condition. Just a clean cloth with a bit of water will do, you just want to prevent grime and dust buildup if you swap lenses a lot.

[tibbitts]

I don't understand why people are compelled to push the weather sealing issue, as we sometimes read here ("rinsing off" a body, etc.) Water damage is clearly not covered by any warranty unless it can be proven it's due to a defect - like a missing seal.

I have had my K5 damaged by water - being hit by an ocean wave. It kept working, but the next day several controls behaved completely differently than normal - they took on functions of other controls or worked the opposite of how they usual did (up became down, etc.) Another day of drying and all was well, however, and that was more than a year ago. In any case I try to keep my camera covered when I'm using it in anything more than a mist.

[TER-OR]

I agree, it should be considered a bit of insurance. It's not a diving camera. It's why we need to say weather resistant, not waterproof.

There are small rugged cameras available if you know you're going to get wet. We have an older Olympus version which has been reliable.

[pxt]

On heavy rain I tested K3 II with 100 mm Pentax WR lens. It is working fine without any other attachment. I only clean lens after use to remove rest of water and don't get moisure in home.