Great work on your housing mod!
To use the 16-35 f4, are you required to remove the entire port and attach the lens to the e-mount after camera is already installed in the housing... finally re-installing the twist-mount, gasket sealed port back onto the housing?
Can you share some photos taken with the 16-35 (@16mm) inside the dome even if they are above water? Which dome is this? I see a few variants for sale on Amazon that would work, but the optical quality is questionable.