Used Ikelite 6116.15 Underwater Housing for Sony Cyber-Shot RX100 Mark III, RX100 Mark IVOlder RX100 Mark I and Mark II cameras are not usable in this housing due to differences in lens and control placement. Ergonomics A new slide in, front loading camera mounting tray makes this housing a breeze to set up and shoot. Controls are provided for all important camera functions including a re designed, spring loaded rear dial control. Rear push button controls are laser engraved for identification with a new bright red push button for the