neutral density

British  

noun

1. 1. black, white, or a shade of grey; a colourless tone

   2. ( as modifier )

      a neutral-density filter

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Example Sentences

I have an assortment of neutral density filters because I had previously photographed an annular eclipse, when the moon is farther away in its Earth orbit and therefore doesn’t block the entirety of the sun.

From Seattle Times

"That same neutral density is the threshold for instabilities known as tearing modes. Beyond that density, tearing modes tend to get destabilized, cause threats to the plasma and may stop the fusion reaction if left uncontrolled."

From Science Daily

If you’re filming video or shooting wide-aperture photos with a system camera in bright light, a variable neutral density filter can be a huge asset.

From The Verge

"Most of the time I use neutral density filters to force long exposures and keep my work minimalist in style. Some of my exposures last five minutes or more, which makes any distracting elements in the water or sky disappear - the longer the exposure, the clearer the photograph."

From BBC

Bringing back the built-in neutral density filter, which makes shooting in bright sunlight easier.

From The Verge