This filter is made from optical glass and has multi coating on both sides. At 4mm thickness it is a very good fit in the 4 x 5.65 filter frames of mini matte boxes and the larger matte boxes.
Nano neutral density filters reduce the amount of light that gets to the camera sensor.this allows you to use a slower shutter speed than you would typically be able to in a bright light situation.
Provides 3 stops of light reduction.use it in the matte box connected to a video camera, it cuts down the light without adding any sort of cast or alteration to the image.
Scratch-, oil-, and water-resistant nano-coating creates a protective layer over the glass, making it ideal for use in harsh environments and easy to clean.constructed from optical glass for clarity.
4 inch x 5.65 inch neutral density ND8 (0.9) 3-stops filter 4mm thickness keeps the weight down to a mere 145.5g,is designed to sit infront of the lens, held in a filter holder or matte box.
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