Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun photography A system of three (not five)
mirrors used as a cheaper substitute to apentaprism in theviewfinders of some single-lens reflexcameras
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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• Dedicated live view sensor (pentamirror tilt system) • 1200 zone evaluative metering
Photography Tips Dphotojournal com 2010
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The pentamirror viewfinder is otherwise unchanged from that of the K-x, with the Pentax K-r providing the same 96% viewfinder coverage, 0. 85x magnification, and -2.5 to +1.5 diopter adjustment.
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Sony's Live View mode is also unusual, because it uses a secondary sensor inside the pentamirror that doesn't interfere with the A500's autofocus system, unlike other digital SLR designs.
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Sony's Live View mode is also unusual, because it uses a secondary sensor inside the pentamirror that doesn't interfere with the A500's autofocus system, unlike other digital SLR designs.
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(It seems to me that beneath the pentamirror prism would be an ideal location which wouldn't likely be bumped or covered).
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Here you press a button on the left of the camera's pentamirror housing and it pops up.
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I suspect this is due to how Nikon trimmed its outer dimensions as well as the addition of an actual pentaprism in substitution for the D70's pentamirror arrangement.
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A normal pentamirror arrangement reflects the light out the optical viewfinder eyepiece..
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You can easily see the gradually increasing size of the cameras - and the size of the pentaprism / pentamirror hump as you move up the range.
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In addition to the Live View LCD, the camera also features an eye-level pentamirror single-lens viewfinder covering about 95\% of the frame.
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