I have a raincoat for my equipment.I would never allow my camera worth $3000 and my lens $2000 get wet. This is what I use.
Szalajj wrote:
If you can afford the Sigma S, go with it. You could try the extender on that one, and have quite a reach.
I never would have thought about a moisture resistant lens before the last eclipse. But after being on site for a 4 hour period, all of my equipment was soaked with condensation. I didn't have enough dry lens wipes with me to keep up with the moisture building up on my camera, lens, or telescope that night.