About Network Redundancy; About Power Redundancy - Axis Q1659 User Manual

AXIS Q1659 Network Camera
Product overview
product than in traditional surveillance cameras. Depth of field becomes shallower in dark conditions, due to the fact that the iris
opens up to provide enough light to the sensor.
Find out more at axis.com/learning/web-articles/lenses-for-network-video-cameras
About focus and light sensitivity
The focus point is affected by the aperture (f-stop) of the lens. The lower the f-stop value, the more light reaches the image sensor.
The smaller the aperture, the deeper depth of field which may lead to an unwanted absolute focus point. During low light conditions,
when the aperture is as large as possible, the depth of field decreases and the image may therefore appear unfocused.
Examples of apertures for different f-numbers.
To calculate the distance between the camera and the object of interest in relation to scene dimensions, resolution, and focal length,
use the lens calculator tool, go to axis.com/tools/lens-calculator
About lens filters
You can use any filter for standard optics to protect the lens from damages or to modify the image. This can be useful in difficult light
conditions, to filter certain wave lengths or to reduce reflections.

About network redundancy

The software controls the network redundancy and requires that both network connectors (RJ45 and SFP) are connected. The SFP
module has higher priority than the RJ45 connector. If the connection between the SFP module and the switch is lost the product
switches to the RJ45 connector to establish a continued connection.

About power redundancy

The software controls the power redundancy. If, for example, the DC connection fails, the camera automatically switches to PoE.
Depending on the setup, the camera may restart for the change to take effect.
5