Picturecorrect says 7, Brooke Shaden says 11 in the video.
Underwater photography isn’t for the easily unmotivated. Aside from being technically difficult, there are an assortment of other concerns. It requires a lot of forethought and planning. If you are thinking about getting started in underwater portraiture or have already tried your hand at it, the advice Brooke Shaden shares in the video below could prove to be invaluable.