Metro Case Multi-Grip for Sony RX1, RX1R: Front Grip with Thumb Rest & Arca Quick Release (Black) Compatible with Sony RX1, RX1R Front Finger Grip with Rear Thumb Rest Arca-Swiss compatible quick release with secondary tripod socket Easy access to battery, SD card, HDMI ports with grip attached Extremely lightweight (39 grams), about 1/4 the weight of competing products