We claim the ornamental design for a microphone adapter for digital still cameras, as shown and described.
FIG. 1 is a front perspective view of a microphone adapter for digital still cameras of the present invention;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a first side view thereof;
FIG. 6 is a second side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is a front perspective view thereof, shown with the cover in an open configuration; and,
FIG. 10 is a front perspective view thereof, shown in condition of use with a camera disclosed in broken lines to illustrate an environment.
The broken lines depict portions of the microphone adapter for digital still cameras in which the design is embodied that form no part of the claimed design. The broken lines showing a camera in FIG. 10 represent environmental structure and form no part of the claimed design.