IDX System Technology 4 x 5.65" ALPHA-I Solid Neutral Density 0.9 Filter (3-Stop)

OVERVIEW 8x Filter Factor, 3-Stop Darkens Entire Image Allows Reduced Shutter Speed Allows Wider Aperture Optical Glass Construction Multi-Coated 4mm Thick Padded Pouch The 4 x 5.65" ALPHA-I Solid Neutral Density 0.9 Filter from IDX System Technology is an ND filter with an 8x filter factor that provides a 3-stop exposure reduction. Its 0.9 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. Neutral density filters are intended to not affect the coloration of the image and are ideal for pairing with other filters. To prevent internal ghosting and reflections, each glass surface includes multiple layers of anti-reflection coating. These coatings also offer greater protection to the filter substrate and help it to stay clean for longer than with uncoated filters. This filter is constructed from optical glass for clarity as well as color fidelity, and measures 4mm thick. Compatible with filter holders that can accommodate 4mm-thick, 4 x 5.65" rectangular filters. Neutral density filters darken the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required. Providing a 3-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily. Filter does not affect coloration of the image and is ideal for use with other filters. Each surface includes multiple layers of anti-reflection coating that also offer greater protection to the filter substrate and help it to stay clean for longer than with uncoated filters. Constructed from optical glass for clarity and color fidelity. Padded pouch included for storage and transport. SPECS Filter Type Solid ND Density 0.9 (3-Stop) Rectangular Size 4 x 5.65" / 101.6 x 143.5 mm Coatings Multi-Coating Filter Thickness 0.16" / 4 mm Filter Material Glass Packaging Info Package Weight 0.535 lb Box Dimensions (LxWxH) 7.85 x 5.85 x 0.95"