NiSi Reverse GND 100*150mm Square Optical Glass Filter Graduated ND Filter. GND allows the use of relatively longer shutter speeds while retaining a wide aperture even in bright illumination. This allows for the emphasis of the subject by controlling depth of field or creating motion effect with subject blur
Key Features :
High quality environmental optical glass for increased optical clarity and color fidelity
Eliminates overly bright, washed-out images
Precise grinding and polishing on both sides
Multi-layer coating on both sides reduce reflection and "ghost images"