halation

[hey-ley-shuhn, ha-]

noun

Photography.

1. a blurred effect around the edges of highlight areas in a photographic image caused by reflection and scattering of light through the emulsion from the back surface of the film support or plate.

halation

/ həˈleɪʃən /

noun

1. photog fogging usually seen as a bright ring surrounding a source of light: caused by reflection from the back of the film

Word History and Origins

Origin of halation¹

First recorded in 1855–60; hal(o) + -ation

Word History and Origins

Origin of halation¹

C19: from _halo + _-ation

Example Sentences

When viewed from several feet away, the dots coalesced into a halation of amorphous color.

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The same mixture makes an excellent backing for dry plates to prevent halation.

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Mr. Russell, Government Astronomer of New South Wales, finds that the "halation" of star photographs can be prevented by pouring over the back of the plate a film of collodion suitably stained.

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Between Lida and the men who were circling the fire there was a veil of mist, and in the halation her champions loomed with heroic stature.

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The first advantage, which I soon discovered, is their entire freedom from halation.

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