N120 Extension Ring 30 ~with Lock MOD plus one of the following:

plus one of the following:

The main difference

Z240 type 4

The NA-H4D housing allows convenient access to all functions of the camera

This focus gear is specific for the Sony SEL2470GM FE 24-70mm F2

N120 Extension Ring 30 ~with Lock MOD plus one of the following:The Nauticam Extension Ring 30 with Lock is part of the N120 Port System and can be used to add 30mm effective length to an N120 Port setup. See Port Chart for more details on choosing the correct extension and port. Technical Specifications Depth Rating 150m Port System N120 Weight 0. 21kg Port Opening Diameter 109mm from SN A184206 and later Port Diameter Body Material Anodized Aluminum Alloy Port Material Port Coating Port Shade Material Removable