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- Focus_finder abstract "A focus finder is a simple optical tool used to examine a virtual image in an optical device to achieve a precise point of focus.They are most commonly used in photographic enlarging to ensure that the negative image is accurately focussed on the easel.Focus finders are designed so that their optical path is exactly equal to the optical path of the uninterrupted light. In enlarging, this is achieved by mounting an angled front-silvered mirror on a small plinth and using a strong magnifying eyepiece and graticle to examine the reflected virtual image. The enlarger lens is then carefully focussed until the grain structure of the film can be seen in the plane of the graticle.".
- Focus_finder wikiPageExternalLink 61_focus_finder_01.html.
- Focus_finder wikiPageExternalLink 61_focus_finder_howitworks.html.
- Focus_finder wikiPageID "6454043".
- Focus_finder wikiPageRevisionID "513282046".
- Focus_finder hasPhotoCollection Focus_finder.
- Focus_finder subject Category:Optical_devices.
- Focus_finder subject Category:Photography_equipment.
- Focus_finder type Artifact100021939.
- Focus_finder type Device103183080.
- Focus_finder type Instrumentality103575240.
- Focus_finder type Object100002684.
- Focus_finder type OpticalDevice103851341.
- Focus_finder type OpticalDevices.
- Focus_finder type PhysicalEntity100001930.
- Focus_finder type Whole100003553.
- Focus_finder comment "A focus finder is a simple optical tool used to examine a virtual image in an optical device to achieve a precise point of focus.They are most commonly used in photographic enlarging to ensure that the negative image is accurately focussed on the easel.Focus finders are designed so that their optical path is exactly equal to the optical path of the uninterrupted light.".
- Focus_finder label "Focus finder".
- Focus_finder sameAs m.0g5z6r.
- Focus_finder sameAs Q5463934.
- Focus_finder sameAs Q5463934.
- Focus_finder sameAs Focus_finder.
- Focus_finder wasDerivedFrom Focus_finder?oldid=513282046.
- Focus_finder isPrimaryTopicOf Focus_finder.