Originally posted by Andrew Lang i agree that the weather sealing has it's limits but when i look at what cannon is doing with it's l design glass, i think pentax should try and keep the lenses from expanding if they are weather-sealed, that way they won't suck in moisture when you extend the lens. i am by no means a lens design expert, but i don't want my camera to suck in moisture when i am out on a shoot.
I ice climb and sometimes when i am taking pictures of people on the ice on a nice sunny day, the ice will start to melt and i am in the middle of a waterfall, i still want to get the shot, that's why i bought the a camera from the brand with adds showing it getting doused by a martini.
i will be getting a camera with video soon, i'll link the movie here to show what is going on.
There are plenty of sealed Canon "L" lenses that don't have internal zoom.