Hands On: This lens is well built: extremely compact and light, beautifully finished in matte black, and engraved with distance (meters, yellow; feet, blue) and depth-of-field scales. It's all-aluminum alloy, including the velvet-flocked lenscap and telescoping sunshade. The bright green ring signifies a DA, or digital-only, lens. We found its manual-focus turning action was even and very well-damped. AF action on the *ist DS was reasonably fast, accurate, and quiet. Its "Quick Shift" AF feature enables manual focusing in the AF mode.