Hello!

Ikelite 6215.04  Action Underwater Dive Housing for Sony RX100 Mark III, RX100 Mark IV, RX100 Mark V.  

And Ikelite 6404  DC4 6 Inch Dome for Compact Housings.

Also fits the Mark 6 and 7, with the shorter lens barrel the camera lens cannot be zoomed in (I think it was like 1/2 way or so?) all the way to the most telephoto.  With the DC4 6 inch dome the Sony Mark 6 and 7 (VI and VII) can use the full length of the telephoto lens.

Lightly used a few times in shallow water.

If I remember correctly some of the buttons are a bit different from model to model.  I was able to record video using the Mark 7 in the housing.

This housing is part of their compact line, it's lighter than the bigger ones they sell specifically for the Mark 6 and 7.

https://www.ikelite.com/products/underwater-housing-for-sony-rx100-mark-iii-iv 
https://www.ikelite.com/products/dc4-6-inch-dome-for-compact-housings 

From Ikelite's website:
Controls are provided for Shutter button, ON/OFF (Power) button, W/T (zoom) lever, Movie button, Fn button, MENU button, Up/Down/Left/Right buttons, FUNC./SET button, Playback button, Delete button

Lens Port
3" Diameter with 67mm Threads

Depth Rating
200 feet (60 meters)
Weight
1.1 lb
Dimensions
6 x 4.6 x 4.5" (152 x 117 x 144 mm)
Rear O-Ring
0132.45




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