Aquatica Port Extension Canon EF 16-35mm f/2.8 L II

Has anyone used an Aquatica Housing for shooting a Canon EF 16-35mm f/2.8 L II lens?

I am trying to determine which extension to use.

The Canon lens chart shows

Canon Lens                                          Zoom          Focus       Extension

Canon EF 16-35mm f/2.8 L II USM         48708  AF only     48457
Canon EF 16-35mm f/2.8 L II USM *(2) 48708   19064       48464*(2)

The problem I have is that the 48457 is 54.5mm and the 48464 is 74.5mm.

There is a 48459 at 74.5mm.

Thanks for any information.

-Rick

I suggest to contact directly Aquatica support. I wanted to use a lens that was no on the chart and contacted them, they determined the best extension for me!

The second option is if you want a manual focus gear and the footnote says that the 48464 extension is fitted with a MF gear.  I suspect they don't have an extension that is 54.5mm long and also has a focus gear/knob.  Aquatica should be able to clarify but I expect if don't need a MG control on the extension that the 48457 extension will be the one.