AF action was quiet but slow. (Because the Nikon-mount version relies on the camera's AF motor, autofocus doesn't work on the Nikon D40, which lacks an internal AF motor. See this month's Editorial for more.) The ribbed, rubberized zoom collar is amply proportioned, well damped, and smooth-turning, with large, clean focal length markings. The lens is internal-focusing, so it works well with most lensmounted filters and flash systems. Its built-in tripod collar, which unfortunately is not removable, rotates freely. Finally, it comes with a large, reversemounting, petal-type shade that's lined in black flocking to suppress reflections.