Anybody taken the nikon 18-200mm underwater?

I've seen a few posts that say "keep the Nikon 18-200 lens topside, but nobody has explained why.

I was wondering, given a dilema of lens choices, whether the range offered by the 18-200, what the downside was?

All thoughts appreciated

UKDiver

It grows a lot when zoomed so it would be very difficult to house it. I think you would need strong diopters because its close focus distance of 50cm...

Ikelite does not recommend this lens for any of its ports. I think its a fantastic travel lens ( I have one) but I would bring a 12-24mm, 10.5mm 60mm or 105mm underwater instead.

I asked Ikelite about it and they sait there was no way to engineer a port because of the change in length from 18mm to 200mm.