Difference between revisions of "Split prism"
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Split-image devices are often combined with [[microprism]]s. | Split-image devices are often combined with [[microprism]]s. | ||
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| + | Split-image devices in focus screens should not be confused with the [[rangefinder (device)| twin-window rangefinder]] fitted to [[rangefinder camera]]s. | ||
{{glossary}} | {{glossary}} | ||
Revision as of 00:36, 5 May 2008
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| Focusing screen with microprism ring in the centre, around a split-image device |
In a reflex camera's focusing screen, a Split-Image', sometimes called a split image rangefinder or Split-Prism, is an optical focus-assistance device that displays an image divided in two. When the image is out of focus, the two halves of the image are separated; when in focus, the halves line up to form a single image. The split is often horizontal, but sometimes diagonal.
Split-image devices are often combined with microprisms.
Split-image devices in focus screens should not be confused with the twin-window rangefinder fitted to rangefinder cameras.
Glossary Terms
