The Kaiser Focusing Stage (5531) is an extremely flat focusing stage with fine drive with spindle. Rapid adjustment is available with a single lever lock. Locking screw. Setting range 120 mm (4.7 in.) with mm scale. Large camera platform with non-slip surface and interchangeable 1/4″/ 3/8″ mounting thread. 1/4″/ 3/8″ tripod thread. Made of black anodized aluminum. Two focusing stages can be combined for crossed stages.