The ornamental design for an electronic flashdevice for camera, as shown and described.
FIG. 1 is a top, front and left side perspective view of an electronic flash device for camera showing my new design;
FIG. 2 is a top, front and right side perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a left side elevational view thereof;
FIG. 8 is a right side elevational view thereof; and,
FIG. 9 is a reduced top, front and left side perspective view, a camera is shown to illustrate environment only and forms no part of the claimed design.