We claim the ornamental design for a camera tripod, as shown and described.
FIG. 1 is a front-left-upper isometric view of a camera tripod in a first configuration.
FIG. 2 is a lower-right-upper isometric view of the camera tripod in the first configuration.
FIG. 3 is a front view of the camera tripod in the first configuration.
FIG. 4 is a right-side view of the camera tripod in the first configuration.
FIG. 5 is a back view of the camera tripod in the first configuration.
FIG. 6 is a left-side view of the camera tripod in the first configuration.
FIG. 7 is a top view of the camera tripod in the first configuration.
FIG. 8 is a bottom view of the camera tripod in the first configuration.
FIG. 9 is a back view of the camera tripod in a second configuration.
FIG. 10 is a front-left-upper isometric view of the camera tripod in a third configuration.
FIG. 11 is a top view of the camera tripod in the third configuration; and,
FIG. 12 is a right-side view of the camera tripod in the third configuration.
Broken lines shown in the FIGURES depict boundary lines and additional features of the camera tripod. However, no broken line shown in the FIGURES forms any part of the design claimed in the instant Application.