The EF-S 60 macro focus gear works for the Tokina 11-16 2.8 on my 20D in Aquatica housing. They may have changed the design of the gear, but it should still work.

Do i need a diopter with the 8 inch dome port?

Have 10-22 with zoom gear for good price.

I use the gear for the nikon 12-24mm and it works fine. I would suggest a diopter, really helps corners at wider apertures. I use the 9.25" megadome though. Cheers,

Chris

What extenstion ring are you guys using for this lens?

Cheers,
Ryan.

With my D300 housing and the 8" dome port I use the 18463 extension ring

http://www.aquatica.ca/subpages/catalog/product/rings.asp

Simon

i'm using the 18456 because i already own it for the nikon 12-24mm, but i think the 18463 would be better.

with the Canon, the 18453 works, but the 18462 might be a bit better (or not, and i'm not packing another extension)


i've also heard the +2 is a good idea with the 8 in port, so i'll add that