Marshmellow
Contributor
Nauticam 20mm Extension Ring with Kenko 1.4 TC (Canon)--$ 375
Includes:
Nauticam locking extension ring, 
Kenko 1.4X TELEPLUS PRO 300 DG Teleconverter for wide angle macro.
This creates very sharp wide angle macro (WAM) shots focusing up to the
 dome face and also a nice medium wide angle set-up for larger animal/fish
shots when a fish-eye is too wide. It also works well with the
Canon 100mm 2.8 USM for extreme super-macro.

Like new under warranty
Cost New $ 539 Will separate out Kenko TC for $135 (mint condition)
See other ads for all associated equipment.
Photos of all equipment can be seen at:
Nauticam Photo System for Sale - a set on Flickr
Happy diving
mcolleypublic@gmail.com
Includes:
Nauticam locking extension ring, 
Kenko 1.4X TELEPLUS PRO 300 DG Teleconverter for wide angle macro.
This creates very sharp wide angle macro (WAM) shots focusing up to the
 dome face and also a nice medium wide angle set-up for larger animal/fish
shots when a fish-eye is too wide. It also works well with the
Canon 100mm 2.8 USM for extreme super-macro.

Like new under warranty
Cost New $ 539 Will separate out Kenko TC for $135 (mint condition)
See other ads for all associated equipment.
Photos of all equipment can be seen at:
Nauticam Photo System for Sale - a set on Flickr
Happy diving
mcolleypublic@gmail.com