TELECONVERTER LENS, OPTICAL DEVICE, AND METHOD FOR EXTENDING FOCAL DISTANCE OF MASTER LENS

摘要

PROBLEM TO BE SOLVED: To provide a teleconverter lens having high imaging performance, an optical device having the same and a method for extending the focal length of a master lens.;SOLUTION: The attachable/detachable teleconverter lens TC, which is attached to the image side of the master lens ML to be used, comprises, in order from an object side, a first lens group G1 having positive refractive power, a second lens group G2 and a third lens group G3. The second lens group G2 has a cemented lens including a negative lens, and the third lens group G3 has a cemented lens including a negative lens.;COPYRIGHT: (C)2011,JPO&INPIT