I am familiar with my Nikonos V and 15mm which is going toward a new housing - for wide angle I am leaning toward the 10.5DX, Should I consider the 16mm insted?

There were a few similar topics lately. The 16mm is easier to shoot with, but ultimately I think the 10.5 will give you better results. Take a look at these for more info:

http://wetpixel.com/forums/index.php?showtopic=10569

http://wetpixel.com/forums/index.php?showtopic=10508

Luiz

Yeah - after reading all of that we can end this post I think the 10.5 is the way to go, it's cheaper also and will be nice to have on land. Thanks Rocha