Calibration Chessboard

Product information "Calibration Chessboard"
In order to calibrate RyngDyng, one of these chessboards is required. It consists of two stripes made of polycarbonate and with 'chessboards' printed on them. The stripes are connected with two flexible bands. By means of this construction, they well fit into every RyngDyng case.
For calibration, the upper chessboard is pinned to the target at a central position using ordinary target pins. The lower chessboard is adjusted vertically using the markers.