Dinion Day/Night Camera
Glossary | en
35
Bosch Security Systems
Installation and Operation manual
F.01U.163.823 | v1.0 | 2010.01
further enhanced by integrating a number of fields to improve
the signal-to-noise ratio of the camera (this may introduce
motion blur).
Default Shutter
A feature allowing the shutter speed to be set to a fast speed to
eliminate motion blur and provide a detailed and clear image of
fast-moving objects while there is sufficient light. When light
levels fall and other adjustments have been exhausted, the
shutter speed reverts to the standard setting to maintain
sensitivity.
Depth of Field
The distance from the nearest to the furthermost point that
appears in focus. The smaller the aperture, the greater the
depth of field.
Dynamic Noise Reduction (DNR)
A digital video processing technique that measures the noise
(image artifacts) in the picture and automatically reduces it.
E
Electronic iris
Electronic iris (or AES - Automatic Electronic Shutter) adjusts
the camera shutter speed to compensate for lighting changes.
In some cases this can eliminate the need for an autoiris lens.
F
F-Number
The standard measure of the lens aperture, which is the iris
diameter, divided by the focal length of the lens. The lower the
maximum aperture (F-Number or F-Stop), the more light that
passes through the lens.
F-Stop
See
F-Number
Field of View
The measure of the visible area within the camera’s field of
view. The larger the focal length, the smaller the field of view.
The smaller the focal length, the wider the field of view.
