Kenko Square Glass Lens Half for Light Intensity 390375 Filter, ND4, 76x95mm, Adjustment,

Half-ND filter: The filter has ND processing applied to half of its surface. This is very useful when shooting in situations with extreme differences in brightness. Highly flat glass Hard type with a clear boundary between the ND (Negative Degradation) and non-ND (Non-Digitized) areas Country of manufacture: Japan