B&H Photo has the Kenko DG Extension Tube Set in stock for $179. Direct link: Kenko DG Extension Tube Set for Micro Four Thirds AEXTUBEDGM43 The DG Extension Tube Set for Micro Four Thirds Lenses by Kenko is a set of two extension tubes for Micro 4/3 cameras. This set has tubes of 10 mm and 16mm. The tubes can be used individually or in combination to obtain the desired magnification. Extension tubes are hollow cylinders without optics designed to enable a camera's lens to focus closer than its minimum focusing distance and therefore provide more magnification. They are placed between the lens and body and are particularly useful in allowing lenses without macro capability to shoot macro. An extension tube increases lens magnification by an amount equal to the extension distance divided by the lens focal length. For example, the Olympus 45mm f/1.8 lens offers a magnification of 0.11X, and after adding both tubes )10mm and 16mm), the new magnification will be 0.11X + (26/45)X = 0.69X. Kenko's Auto Focus extension tubes are designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with Micro Four Thirds lenses. Note: When using extension tubes the lens will not focus to infinity. The focus range will be greatly limited to a very close focusing distance. There is light fall off when using any extension tube, sometimes the equivalent of 3 f-stops of light is lost when using multiple extension tubes together. This light loss can affect the camera's ability to auto focus. Update: I've been contacted by a reader that the tubes work fine individually but when combined will not communicate the lens data (lens communication problem) when combining the two tubes. This was confirmed by another reader. The above links contain our affiliate code so that B&H credits us for referring you so long as you click out link prior to putting the item in your "shopping cart". Your price is unaffected. Thanks for supporting Mu-43.com!