Scheiner speed

noun

The speed (expressed in degrees) of a plate used for astronomical photography, rated by the least exposure required to produce a visible darkening upon development.

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Meanings

nounScheiner speed (plural Scheiner speeds)

plural Scheiner speeds

  1. The speed (expressed in degrees) of a plate used for astronomical photography, rated by the least exposure required to produce a visible darkening upon development.

Origin

The system was devised by the German astronomer Julius Scheiner in 1894.

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Cite this entry
APA

Scheiner speed. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Scheiner%20speed

MLA

“Scheiner speed.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Scheiner%20speed. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Scheiner speed,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Scheiner%20speed.

Source: Scheiner speed on Wiktionary, CC BY-SA 4.0.