Patent ID: 7843504

Claim:
An apparatus comprising: a camera cap body, which is attached to a camera lens housing of a camera when measuring white balance of a scene and when the camera is not in use, the camera cap body comprising: a locking mechanism to engage with the camera lens housing; and a ring-shaped area that partially covers a front side of a camera lens of the camera when attached to the camera lens housing, wherein an inner periphery of the ring-shape area defines a cut-out area located at a center of the camera cap body; and a translucent piece, which is inserted into the cut-out area when measuring white balance of the scene and when the camera is not in use, the translucent piece being exposed on both front and back sides of the camera cap body when inserted into the cut-out area, the translucent piece being manually removable from the camera cap body and interchangeable with another translucent piece of a different color tone, wherein the translucent piece has a size that fits into the cut-out area and is correlated with an area covered by an in-camera spot meter of the camera.