The Canon EOS 5D Mark III, EOS 5D Mark IV, EOS 5DS, and EOS 5DS R cameras are very similar on the surface. Key differences affect how they operate inside of an underwater housing.
Underwater Housing # 6871.03
| Controls | TTL Strobes | Manual Strobes | |
| Canon EOS 5D Mark III | Yes | Yes | Yes |
| Canon EOS 5D Mark IV | Update Kit # 9295.02 | Yes | Yes |
|
Canon EOS 5DS, 5DS R |
Yes | No | Yes |
Underwater Housings # 6871.04
| Controls | TTL Strobes | Manual Strobes | |
| Canon EOS 5D Mark III | Yes | Yes | Yes |
| Canon EOS 5D Mark IV | Update Kit # 9295.02 | No | Yes |
|
Canon EOS 5DS, 5DS R |
Yes | Yes | Yes |
Underwater Housing # 6871.09 / 71702 / 73702
| Controls | TTL Strobes | Manual Strobes | |
| Canon EOS 5D Mark III | Yes | DL5 DS Link Canon TTL Kit # 46075 | Yes |
| Canon EOS 5D Mark IV | Yes | Yes | |
|
Canon EOS 5DS, 5DS R |
Yes | DL5 DS Link Canon TTL Kit # 46075 | Yes |
