Internal focusing minimizes the effects of lens breathing, which ensures a more consistent focal length when adjusting focus. Fujinon's QuickZoom technology improves zoom speed to 0.7 seconds end to end. With the push of a button, QuickZoom facilitates a rapid shift to the telephoto end to check focus. Releasing the button automatically returns the lens to the previously selected focal length. Finally, the Focused Intelligent Network Diagnosis (FIND) system aids in preventive maintenance and troubleshooting by evaluating various electronic and mechanical parameters.