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Neutral-density filter
Videos
In photography and optics, a neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of light equally, giving no changes in hue of color
A demonstration of the effect of a neutral density filter. Note that the photograph was exposed for the view through the filter, and thus the remainde
A demonstration of the effect of a neutral density filter. Note that the photograph was exposed for the view through the filter, and thus the remainder of the scene is overexposed. If the exposure had instead been set for the unfiltered background, it would appear properly exposed while the view through the filter would be dark.
A set of ND filters
A set of ND filters
Comparison of two pictures showing the result of using an ND filter at a landscape. The first one uses only a polarizer, and the second one a polarize
Comparison of two pictures showing the result of using an ND filter at a landscape. The first one uses only a polarizer, and the second one a polarizer and a 1000× ND filter (ND3.0), which allowed the second shot to have a much longer exposure, smoothing any motion.
Neutral-density filters are often used to achieve motion-blur effects with slow shutter speeds.
Neutral-density filters are often used to achieve motion-blur effects with slow shutter speeds.
Diffraction-limited system
Videos
In optics, any optical instrument or system—a microscope, telescope, or camera—has a principal limit to its resolution due to the physics of diffraction. An optical instrument is said to be diffractio
Neutral-density filter
…after the filter, and I0 is the incident intensity. The use of an ND filter allows the photographer to use a larger aperture that is at or below the diffraction limit, which varies depending on the size of the sensory medium (film or digital) and for many cameras is between f/8 and f/11, with smaller sensory medium…
Ernst Abbe memorial
Ernst Abbe memorial
Loupe binoculaire p 1030891
Loupe binoculaire p 1030891