Waterproof camera (Canon D10 in my case) is great for shooting in or near water during sports. Unfortunaly, water sprays onto the lens and water droplets form, which disturb or totally destroy the image, depending of their position. I tried
- Cleansing the lens with mild detergent, lowering the surface tension so that water can flow down and off. As a result, thin film of water forms across center of the lens, as I probably failed to properly cleanse the outer part.
- Scuba-inspired use of saliva. Results similar to previous point, without need for detergent.
I did not tried any surface tension increasing substances, which are used for windshield etc, because the droplets would probably stay.
It would be probably possible to use some high-quality filter with good coating, but the camera does not have filter thread.