Neutral density (ND) filters are the most demanded and essential type of photographic filters because of several reasons. For photographers ND filters mean precise control of the amount of light passing through the lens for greater creative control over exposure. For video content creators ND filters help immensely to set shutter speeds to match the frame-rate while maintaining the depth-of-field of the footage.
The HD Mk II IRND8 is the perfect density for creating a beautiful blurred background in portrait or typical daylight conditions that is easily obtained with F1.2 or F1.4 fast prime lenses at maximum aperture but that requires a high shutter speed. As some cameras come with a maximum shutter speed of 1/4000 sec. that would cause over-exposure with such fast lenses, the photographer can still achieve an appropriate exposure by controlling the shutter speed though using the HD Mk II IRND8 filter.
HOYA applies its signature ACCU-ND technology to the HD Mk II IRND series, guaranteeing an even light reduction throughout the visible light spectrum and up into the higher IR spectrum. This means that there is no leak from the infrared band of the light spectrum, guaranteeing that the image does not undergo any negative affect from color shifts.
ACCU-ND is a benchmark for IR ND technology and makes the HOYA HD Mk II IRND series a market leader for high quality ND filters.
Color shift issue due to IR pollution.
The HD MK II IRND series applies an anti-reflection multi-coating that reduces the chance of any reflections caused by the filter. The coating also comes with water- and oil repellent features which makes cleaning the filter easy and stress free.
The HD Mk II IRND series uses an ultra-thin lightweight, precisely crafted aluminum frame, reducing the chance of vignetting immensely when using the filter with wide-angle lenses. It is also very useful when stacking filters, which can be done thanks to the integrated front filter thread.