Sea & Sea Multi View Finder for the Motor Marine III Underwater Camera.

Underwater viewfinder exclusively designed for the MMIII. You will need this item when you use a wide conversion lens. 15mm/20mm scale and center position are clearly visible through a diving mask.

This viewfinder sets the center of view at 4.3 feet away from the eye. When you shoot a subject that is closer than 4.3 feet, you should aim at the point a little bit lower than the center of the subject.