Just ordered an underwater case for my Canon s100, it's a cheap Ebay case and I know, I know, I probably should have ordered some $400 case for a camera that itself is only worth $100. I really just want to experiment with underwater photography and thought that this would be a good way to start. I was thinking about lighting with a cheap underwater flashlight because an underwater flash would be to expensive, have any recommendations for flashlights. Also what filters might I need, I believe the case takes 67mm.
http://www.ebay.com/itm/Neewer-Waterproof-Underwater-Camera-Housing-Case-for-Canon-PowerShot-S100-EM-01-/191247208389?pt=US_Camera_Underwater_Housings&hash=item2c8738cfc5
http://www.ebay.com/itm/Neewer-Waterproof-Underwater-Camera-Housing-Case-for-Canon-PowerShot-S100-EM-01-/191247208389?pt=US_Camera_Underwater_Housings&hash=item2c8738cfc5