Difference between revisions of "Judas window"
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In reference to [[SLR]] cameras, it generally means an arrangement of relay prisms which allow a direct optical view of the current aperture-ring position, visible above or below the main viewfinder image. A small peepsight on the front of the [[pentaprism]] is required. Depending on ambient illumination, the clarity of this feature varies. | In reference to [[SLR]] cameras, it generally means an arrangement of relay prisms which allow a direct optical view of the current aperture-ring position, visible above or below the main viewfinder image. A small peepsight on the front of the [[pentaprism]] is required. Depending on ambient illumination, the clarity of this feature varies. | ||
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Latest revision as of 17:33, 16 March 2023
Glossary Terms
The name Judas window originates in the British English term for the spy-hole in the door of a prison cell (or originally, a church door).
In reference to SLR cameras, it generally means an arrangement of relay prisms which allow a direct optical view of the current aperture-ring position, visible above or below the main viewfinder image. A small peepsight on the front of the pentaprism is required. Depending on ambient illumination, the clarity of this feature varies.
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