The Canon EOS R5 is attractive to underwater image makers for a variety of reasons.  It is a 45MP full frame mirrorless camera that shoots full width 8K video, utilizes Canon's new RF lens mount, and also has next generation Dual Pixel autofocus.
 
Technical Specifications:
Dimensions
357mm x 200mm x 161mm (W x H x D)
Depth Rating
100m
Weight in air
3.5kg
Weight in water
negative 0.05kg (includes camera and battery)
Port Opening
N120
 
Resources
 
Support and Downloads
NA-R5 Housing Product Manual
 
What's In The Box:
NA-R5 Housing
90121 Spare main o-ring, lubricant and removal tool
2x Optical bulkhead caps
2x Handles with mounting balls
Set of allen keys
CR2032 battery for leak detector
Padded housing bag and shoulder strap
 
Optional Accessories:
25624 M14 Vacuum Valve II (Pushbutton Release)
25625 M16 Vacuum Valve II (Pushbutton Release)
32211 Nauticam Full Frame Straight Viewfinder 32°/ 1:1
32212 Nauticam Full Frame Straight Viewfinder 40°/ 0.8:1
32213 Nauticam Full Frame Angle Viewinder 32°/ 1:1
32214 Nauticam Full Frame Angle Viewinder 40°/ 0.8:1
32201 Nauticam 180˚ straight viewfinder
32203 Nauticam 45˚ viewfinder
26301 Manual Flash Trigger for Canon
28130 Hand Strap for 28113
26216 Universal Optical Fiber Cable
25081 M24-M16 Step Down Adaptor
25020 M14 Nikonos 5-pin bulkhead with Canon hotshoe connection
19561 Gear for Canon EF-EOS R Control Ring Adaptor
26320  Control Kit for Canon Drop-In Filter Mount Adapter EF-EOS R
 
HDMI Recommended Configurations
For HDMI 2.0 Cable System
25086 M24 adaptor for HDMI 2.0 Cable
25077 M24D1R205-M28A1R170 HDMI 2.0 Cable (for NA-XT3/R5 to use with Ninja V housing)
17922 Nauticam Atomos Ninja V Housing for Atomos Ninja V 5” 4Kp60 4:2:2 10-bit Reorder/Monitor/Player (excl. HDMI 2.0 cable)
 
For HDMI 1.4 Cable System
25033 Standard HDMI Cable with M16 Thread
25081 M24-M16 Step Down Adaptor
25076 HDMI (D-D) Cable in 200mm Length for NA-XT2/NA-XH1/NA_A6400
17906 NA-502H Housing for SmallHD 502 Monitor
17920 NA-502B-H Housing for SmallHD 502 Bright Monitor
17923 NA-Shinobi-H Housing for Atomos Shinobi 5.2" 4K HDMI Monitor with
HDMI 1.4 input