Imaging systems and methods for calibrating imaging systems are provided.
The imaging system has a body, a scene image capture system that captures
images using a taking lens system that can be set to a plurality of
different focus distances, and a rangefinder that is capable of
determining a distance between the imaging system and at least one
portion of a field of view of the taking lens system. The method
comprises: automatically capturing a first calibration image of a first
field of view through the taking lens system with the taking lens system
set to a first focus distance setting; identifying a portion of the first
calibration image having a predetermined degree of focus; using the
rangefinder to determine a first calibration distance from the imaging
device to the identified portion. A focus correlation is determined based
upon the first calibration distance and the first focus distance setting.