Manfrotto 454 Micrometric Positioning Sliding Plate
Description (from B&H): The Manfrotto 454 Micrometric Positioning Sliding Plate is a quick release system that allows for some positioning within the clamp for fore-aft macro adjustments.
It is the ideal tool to make precise positioning movements to achieve the perfect framed shot, for macro photography, for QTVR, and other precise copy/repro work. This plate has finger-tip control for ultra-fine positioning, but has a simple lock-release lever for fast set-up.
Two plates can be interlocked at 90° for full lateral/forward/back movement (over 4.7″). Made of extruded aluminium, the plate has 1/4″-20 and 3/8″ holes and screws for tripod and camera mounting.