Hey Charlie
Well today is your lucky day. I use Aquapac everyday in my watersports photography business and you can see the results here.
LazyBlueSkies Photogallery
You need to try a few things on the lens like Rainex, and good old spit to keep the water off.
These bags are just fab. My other photographers have spent £1000 on boxes and they produce results that are quite frankly no better. Do feel free to ask me if you have any questions but if you are into kitesurfing, look at my link from shooting Aaron Hadlow and Ruben Lenten a few days ago with a £70 Aquapac bag.....top results.
Do ask me any questions via
chris@lazyblueskies.com if you want to know about kiting photography.
Cheers