This EXT-O68 3-Piece AF Chrome Macro Extension Tube Set for Olympus Evolt Four Thirds-Mount DSLR Cameras from Movo Photo features a chrome auto-focus mounting system, and each tube is designed to shorten your minimum focusing distance. Additionally, these tubes maintain full auto-focus and metering with Four Thirds-Mount lenses, allowing you to create beautiful macro shots of insects, flowers, coins, jewelry, and more.