| http://www.w3.org/ns/prov#value | - In FIG. 1, there is an embodiment of the invention, where 1 is a focusing lens unit which is held stationary during zooming, but moves axially for focusing purposes; 2 is a variable magnification lens unit axially movable mainly for varying the image magnification; 3 is a compensation lens unit movable simultaneously with and independently of the variable magnification lens unit 2 mainly for compe
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