Campbell CCFC Instruction Manual - page 27
CCFC Field Camera
16
A capture event has occurred where communications are
required including FTP or Email transfers. Events requiring
camera memory storage will not turn on the switched power
output, as these events do not require a modem for
communications. It takes the camera approximately 90 secs to
boot up after power is applied; immediately thereafter, the
camera can capture and transfer files.
7.5 Lens
The CCFC lens contains the following features:
Electronic zoom
Automatic focus
The zoom and focus can be adjusted through the web interface
(see Section 12.5 Lens Position).
7.5.1 Camera Lens and Field of View
The CCFC includes a 4.7 - 64.6 mm lens, which provides an
approximate 4
° horizontal field of view when fully zoomed in and
a 67.3
° horizontal field of view when fully zoomed out.
7.5.2 Camera Auto Focus
The auto focus occurs before each capture to ensure photo quality
and compensates for any variations due to temperature or other
external factors. The auto focus can also be used through the web
interface’s Live Preview for photo capture. The auto focus occurs
with each manual zoom action, when adjusting the zoom position
from the web interface. If the auto focus fails, the lens returns to
the best position to ensure photo quality. If the camera is in an
extremely dark environment, the auto focus will use the last
position that was in focus to perform the capture.
The auto focus operation attempts to focus on the most distant
object in the field of view. For example, in a scene with
mountains in the background and a tree in the foreground, the
camera will focus on the mountains.
7.5.3 Temperature Variations and Focus
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