A necessary accessory,
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This review is from: Fotodiox Pro Thumb Grip for Mirrorless Digital Cameras (Type-A; Black), fits: Fujifilm X100S, X20, X-E1, X10, Olympus XZ-2 iHS, Panasonic Lumix DMC-LX7, Pentax Q, Olympus PEN E-PM2, E-P3, E-PL2, E-PM1 (Camera)
It really helps to hold the camera steady, especially while composing using the LED screen. It also prevents accidental touch of the selector buttons. This low cost accessory is an improvement for your camera handling.