Originally posted by hcc Let us remember that (a) WR does not mean water proof, and (b) the concept of WR is a relatively new 'marketing' tool.
Many older, sturdy lenses can withstand very bad weather, albeit TLC - tender love & care - is absolutely necessary. There are few examples and ample discussions at PF: e.g. on the older DA18-250mm taken to the snow, and mountains, without failing. Similarly, short metallic prime lenses are renown for their solidity.
I shoot in bad weather, including sub-tropical storms, on sandy beaches, near the coastlines during strong windstorms.... I have done so for more than 20 years, last 8 years with Pentax SLR(s). I have one WR lens (DA18-135mm WR) and a bunch of non-WR lenses. I take care of my gears incl. the camera and the lenses. I have had no issue, but I do TLC all my materials.
Among my lenses, the Voigtlander Nokton 58mm Ltd and DA 15 mm Ltd are among the most solid ones.I am very, very careful with zoom lenses in bad weather and a sleeve + TLC is a requirement in solid rain. More generally, I found that short metallic prime lenses are among the most sturdy lenses.
My 5 cents....
I think thats absolutely true. Just an example from my side. I was using my 18-55 WR in bad weather conditions without always whiping of the rain / snow und putting it sometimes wet in my camerabag and left it there for some time.
The result was that after about 3 years i noticed fungus behind the front element near the center of the lens.
So even WR wont help you if you overdo it I guess. Learned that for sure...