Overall, a favorable and stable focusing rack, which is for most applications. However, I've found that to solve the lock washers the Camera screw fast. As long as the screws are mounted in a camera, no problem. The camera will not budge, but you should eventually dissolved Keep screw well after use. Otherwise, the threads are precision milled and the slide well adjustable. If you can live with the "screws problem", gets a favorable macro-sled.
