Object is to provide an inner-focusing type zoom lens system carrying out focusing by moving a portion of a first lens group suitable for an auto-focus SLR camera. The First Component, which acts as a resin, includes a first vegetable oil based Polyol A in an amount from 20 to 40 weight percent, a second vegetable oil based Polyol B in an amount from 0. A bit line may be provided on the second insulating layer and on portions of the magnetic tunnel junction memory cell exposed by the hole in the second insulating layer, and ferromagnetic spacers may be provided on sidewalls of at least one of the digit line andor the bit line.