Sea&Sea Extension Ring 46 with Focus Knob #30117

[Description]

Extension Ring 46 with Focus Knob, provides manual focus for compatible zoom lenses. (Extension ring equipped with port lock).

Compatible Housings: MDX series housings.

Compatible Lenses: Canon EF 16-35mm F2.8L ll USM, Canon EF17-40mm F4L USM, AF-S Nikkor 18-35mm F/3.5-4.5G ED, AF-S Nikkor 16-35mm F/4G ED VR(as of June2014).

* Compatible FC focus gear required for manual focusing (can be used in conjunction with a compatible zoom gear).

[Specification]

[Dimensions (DIAxD)] 132x61.4mm / 5.2x2.4inch (excluding protruding parts)
[Weight] Approx. 525g / 18.5oz
[Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminum alloy (alumite coating)
[Distance] Between the mount and the front end: 46mm / 1.8 inches

Instruction Manual for "Extension Ring 46 with Focus Knob"（3.55MB)