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SKU # 21271
The Nauticam Extension Ring 70 with Focus Knob is part of the N120 Port System and can be used to add 70mm effective length to an N120 Port setup.
This Port Extension ring features a focus knob that can be used to operate supported optional focus or zoom gears.
This Port Extension 70 is designed to support the Canon EF 11-24mm f/4L USM lens. An additional focus gear is required.
See Port Chart for more details on choosing the correct extension, port and focus/zoom gear.