B07JL1VG8H Benro Master Hardened Density Filter Master 100x150mm 2-Stop (GND4 0.6) Soft-Edge Graduated Neutral Density Camera Lens Filter (MHGND4S1015)

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Made with hardened Schott B270 German optical glass the finest available precisely ground to ensure brilliantly sharp images with no ghosting.
Ulca Multi-Coating decreases flare and significantly Reduces chromatic aberration (average transmission > 99.0% @420-680nm)
Nano wmc Multi-Coating is scratch resistant and repels water dirt and oil from Smudges and fingerprints making the filter easy to clean
IR ND coating maintains faithful Color rendition by eliminating Color shift caused by unwanted Infrared and uv light
Gradation transition is smooth and natural looking