The 'must haves' for snorkeling:-
a) underwater housing specific to camera model
(gives access to all camera controls/ menus)
ie ability to use the zoom
ie control of, and access to, the flash
(sometimes want no, half or full - flash etc.)
b) a shade for the (LCD) screen (essential but can buy separately)
Not nessarily the housing made by the camera manufacturer:-
a) the housing has to be made for your camera ie for the specific (exact) model
b) not necessarily by the camera manufacturer
c) Ikelite make very good, expensive, housings
- they are made for specific models
- give access to most/ all menus/ controls
- are very good