Aquatica 18457 54.5mm extension ring, never used. I bought this extension for my wife to use her Canon 16-35 with her big dome, but she switched to the 5D MK3 in a Nauticam housing before she could use it.
Original MSRP is $299
Selling for $180 + shipping
Payment via PayPal
Please PM with any questions and thanks for looking!
-Jim (Seattle, WA)
Edited by jplaurel, 19 July 2015 - 11:27 AM.