[External mini finder for GR IIIx] External finder equivalent to 40 mm angle of view to be attached to the hot shoe [Compatible models] RICOH GR IIIx [Features 1] Field of view: Approximately 85%, Finder magnification: Approximately 0.63x [Feature 2] Arbata type reverse Galileo type optical viewfinder (composed of 5 lenses) [Feature 3] Eye point: Approximately 13 mm from the final surface of the lens, pupil diameter: 1.5 mm in diameter [Size] Width: Approximately 20.5mm x Thickness: Approximately 26mm x Height: 18.1mm, Weight: 10.9g [What's in the box] External mini finder GV-3, case, instruction manual