Down2bizDiver
Contributor
1. Yes, use in or out of water. Caution, in and out of water some flat lens cases show vignetting in some modes, 960p 4:3 format for instance.I confess that I did not read all 400 posts. I stopped at about 100. So hopefully my question has not already been asked and answered.
Q. Once you put on a flat optical glass lens to the GoPro housing, can this be used out of the water also?
Q2. If the answer to the above is 'yes', why did GoPro use a curved lens for the housing?
2. GoPro was not (and is not) selling the camera for underwater use and their curved lens works well except underwater.