As can be seen from this graph, this embodiment of the image sensor 17 needs no LPF when the diaphragm 13 is stopped down to a size equal to or smaller than f8. Accordingly, this embodiment of the digital SLR camera 10 turns OFF the low-pass filter operation of the image sensor oscillating circuit 33 and the image shake correcting apparatus 40 when the diaphragm 13 is stopped down to a size equal to or smaller than f8 or when the width of the Rayleigh resolution limit is equal to or smaller than 6 μm.

In addition, when photographing with the diaphragm 13 set at f4, this embodiment of the digital SLR camera 10 cannot resolve small images having a size which is equal to or smaller than 3 μm due to the influence of diffraction (FIG. 4(B), FIG. 6). In this case, a movement of the image sensor 17 by an amplitude of 3 μm, corresponding to half the pixel pitch P, in the low-pass filter operation corresponds to the Rayleigh resolution limit of 3 μm, so that sufficient LPF effect is obtained (FIG. 6). In this case, if the image sensor 17 is moved by an amplitude of 6 μm in the low-pass filter operation, the image sensor would move beyond the Rayleigh resolution limit, which results in the LPF effect being excessively strong. This embodiment of the digital SLR camera 10 produces an appropriate LPF effect according to the influence of diffraction caused by the diaphragm 13, and prevents a sense of resolution from deteriorating to achieve a high sense of resolution while preventing moiré and false color from occurring.