Campbell Scientific CC640 Digital Camera - Manual (Page 29)

CC640 Digital Camera
camera into the field by using an object that is at a similar distance away. It is
much easier to use a larger monitor in an office environment, rather than a
portable TV at the installation site, as sunlight tends to make it difficult to view
a television screen outdoors.
8.1.1 Temperature Variations and Focus
The CC640 can operate under extreme temperature variations. The focus of
the lens can change slightly with large variations in temperature. For example,
if a lens is focused at +25
°C the lens may be slightly out of focus at -30°C.
The change in focus will be less noticeable if the focus is adjusted closer to the
cameras operating temperature.
8.2 Lens Filter
The CC640 camera is equipped with an IR cut filter on its lens. This is
threaded onto the front of the lens and is required to filter out near-infrared
light that can have an undesirable affect on the images. It is recommended that
the filter always be left installed on the lens.
FIGURE 11. Lens and Filter
9. Maintenance
The CC640 requires little maintenance and no calibrations. Keeping the
camera clean and in a dry environment is important for the longevity of the
camera.
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