I recently purchased the X-Cap for $24 from Free-Mod design for my 14-42mm PZ lens. The X-Cap has a very ingenious design. It is a lens cap with a rectangular window and 2 triangular pieces that can close and open the window based on whether the lens is in the retracted or extended position. Normally, with the power off and the lens retracted, the triangular pieces close off the window, preventing dust from entering the lens. When the camera is turned on and the lens extends, the triangular pieces retract, opening a window to enable taking a photo. Here is a link to a video of the X-Cap in action. [ame=https://www.youtube.com/watch?v=ndZhYgEmSMY]auto lens cap for Lumix X 14-42mm - YouTube[/ame] Excellent product for the money. Available in white and black.