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Varifocal (zoom)
CCTV glossary (глоссарий терминов по видеонаблюдению) |
This refers to a type of lens that has the capability to change the focal length. this allows adjustment of the magnification and field of view of the security camera.
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Varifocal, английский
Это недорогой вариант объектива с переменным фокусным расстоянием, которое регулируется вручную.
Varifocal lens, английский
A camera lens with variable focal length in which the focus changes as focal length (and, therefore, the magnification) changes. this is different to a parfocal, or "true" zoom lens, which remains in focus as the lens zooms (focal length and magnification change). varifocal lenses offer greater flexibility over fixed lenses as they allow the lens aperture to be adjusted as needed. varifocal lenses come in a range of apertures, including 2.8-12 mm, 3.5-8 mm, and 6-60mm. the greater the aperture size, the more magnified the image will appear with greater detail being captured. a smaller aperture size will result in a wider view with less detail being captured.
Varifocals, английский
Spectacles with lenses which have varying focal lengths from top to bottom, for looking at things at different distances from the wearer
Capability, английский
- Способность; возможность; мощность; производительность
- A value that developers specify in the app manifest for their windows store apps. windows store apps use capabilities to declare that the app requires programmatic access to protected user resources, such as the pictures library, or connected devices, such as a webcam.
- The ability to perform a function, for example, the ability of a cloud to host highly available virtual machines is a capability, and the ability of a cloud to connect virtual machines to a certain logical network is a capability.
Adjustment, английский
- Регулировка; перестановка; корректировка
- Поправка
- A specific directional high-speed movement of a joint performed by a chiropractor
- In marine insurance, the ascertaining and finally settling the amount of
- A change to an account to correct or update the balance.
- Корректировка
Magnification, английский
- The ratio of image to object size in an optical system. may be real (linear) or apparent (angular). milliradian (mrad)1/1000th of a radian, or 0.0573 degrees; the angle whose tangent is 0.001.
- The increase in the apparent or perceived size or subtended angle of an image in relation to actual size of object.
- Увеличение ~ of lens увеличение лупы
- The power of a microscope (or lens) to produce an image that appears larger than the actual specimen, expressed as a factor of the actual size
Magnificat, английский
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Auto light range, английский
The range of light, e.g., sunlight to moonlight, over which a tv camera is capable of automatically operating at specified output.
Network camera, английский
This refers to a camera that is designed to record pictures and transmit them directly over a computer network or internet connection. network cameras normally do not have any analogue video outputs. the images are encoded directly in one of the standard compression techniques, such as jpeg or mpeg.
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