Athena Extension Ring 70 with Focus Knob (Sea&Sea DX/NX Mount) @inonldmount Speedy Lens Exchange by SD

Speedy Lens Exchange by SD Mount

The robust dial controls are now even larger and taller for comfortable use with even the thickest gloves

Light Shade LF-EW

Bundled "2-Way Ferrule" offers two configurations either rubber or spike tip

Athena Extension Ring 70 with Focus Knob (Sea&Sea DX/NX Mount) @inonldmount Speedy Lens Exchange by SDAthena Extension Ring 70 with Focus Knob, provides manual focus for compatible zoom lenses. Compatible Housings: MDX series housings. Compatible Lenses: Nikon AF S Nikkor 16 35mm F 4G ED VR (Optional Athena FG 16 35n A focus gear required) * Compatible focus gear required for manual focusing (can be used in conjunction with a compatible zoom gear). * Until now, auto focus has been the only option available when using a zoom gear. With the Extension