to jest wniosek patentowy i pisany belkotem patentowym, ale mozna sie doszukac info o afs
"Furthermore if the focusing lens group has a smaller outer diameter and lighter weight than the other subgroup(s), an ultrasonic motor can be selected and quiet focusing can be implemented."
i o vr tez jest
"In the first to fifth embodiments, it is preferable that all or a part of the fourth lens group G4 is moved so as to have an orthogonal component with respect to the optical axis. By this configuration, an image surface can be corrected when an image blur is generated, and good optical performance can be implemented."