Originally posted by Giklab You forgot the 16-85 AF-S DX, but it also only has an ass gasket. Few of those lenses would be a match for even the "simple" WR. And when one looks at the price...
If we include every lens with an o-ring, then Pentax's lineup is larger too. Even the 17-70 has a nice ring, but it's not labelled WR. Reviews from sites such as D P review do mention that some high-end Nikon bodies have seals, but they stress out (and Nikon does too) that they are not fully resistant. In Pentax world, to be labelled WR it must be fully sealed. Otherwise we could say that every K and M lens ever made is WR because it won't stop working under a downpour...
Originally posted by sterretje That's how I composed my kit as well. But I usually don't carry the 18-55 around and use the FA31Ltd, even if it rains.
When I know the weather is risky, I bring my WR kit, and put the 50 and 21 in a safe bag, to be used as needed.