Chuck Lantz
Senior Member
As I've already mentioned, the three Sigma lenses I've used in very wet situations have never failed. Those include both 50-500 models, and a 17-35mm. And that's after five years of use with two of them. The only "damage", if you could call it that, is a few rusty screws.you are just playing with fire.
He's right- new lenses weather sealed are needed to really take advantage of this.
So, while Sigma may not claim its lenses to be weather-sealed, in actual practice at least three of them may as well be.
'If they're not screaming at you to get out of the way, you're not close enough' http://www.ChuckLantz.com