Difference between revisions of "Split prism"
m (not same as rangefinder) |
m (minor reword) |
||
| Line 1: | Line 1: | ||
| + | {{glossary}} | ||
{{Flickr_image | {{Flickr_image | ||
|image_source=http://www.flickr.com/photos/primovelho/543905650/ | |image_source=http://www.flickr.com/photos/primovelho/543905650/ | ||
|image=http://farm2.static.flickr.com/1280/543905650_44f6b5be52_m.jpg | |image=http://farm2.static.flickr.com/1280/543905650_44f6b5be52_m.jpg | ||
|image_align=left | |image_align=left | ||
| − | |image_text=Focusing screen with | + | |image_text=Focusing screen with a split-image device in<br>the centre, surrounded by a [[microprism]] ring |
}} | }} | ||
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. | 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. | ||
| Line 9: | Line 10: | ||
Split-image devices are often combined with [[microprism]]s. | Split-image devices are often combined with [[microprism]]s. | ||
| − | Split-image devices in focus screens should not be confused with the [[rangefinder (device)| twin-window rangefinder]] fitted to [[rangefinder camera]]s. | + | Split-image devices in focus screens should not be confused with the [[rangefinder (device)| twin-window, or coincident rangefinder]], fitted to [[rangefinder camera]]s. |
| − | |||
| − | |||
Revision as of 01:10, 8 July 2008
Glossary Terms
|
| Focusing screen with a split-image device in the centre, surrounded by a microprism ring |
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, or coincident rangefinder, fitted to rangefinder cameras.
