Campbell Scientific CC5MPX and CC5MPXWD Digital Network Cameras - Manual (Page 94)

Section 14. Lens
14-4
There may be instances where the focusing numbers cannot be used to focus
the CC5MPX. One such scene may be where a nearby object is desired to be in
focus and the background may be out of focus. However, for most “scene”
images where nearby objects and far objects are not involved, the focusing
numbers work well.
FIGURE 14-4. Homepage Video Display and Focusing Numbers
14.3 Temperature Variations and Focus
The CC5MPX 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 +35
°C the lens may be slightly out of focus at -40°C.
The change in focus will be less noticeable if the focus is adjusted closer to the
cameras operating temperature.
14.4 Lens IR Cut Filter
The CC5MPX camera is internally equipped with an IR cut filter. The filter is
required to filter out near-infrared light that can have an undesirable effect on
the images.