During playback, the left and right images are output alternately in a single video signal to provide the 3D image. Adjustments, special training and considerable time are not needed with the Canon 3D lens. The compact design of the lens permits perfect synchronization of zooming and focusing. The system delivers precise, reliable optical axis alignment, and it is easy to operate. The Canon 3D zoom lens incorporates a unit that uses triangulation to measure the distance to the subject.
Motors adjust focus and the mirrors inside the left and right lenses.
This permits automatic setting of focus and the angle of convergence, making it easy for even novice users to record in 3D. The Canon 3D zoom lens also allows the user to manually set the focus and convergence point.