B&H Photo has the Vello Deluxe Extension Tube Set (10mm + 16mm) on sale for 20% off right now. PRODUCT HIGHLIGHTS For Micro Four Thirds Cameras & Lenses Reduces Minimum Focus Distance of Lens Provides Macro Capability Retains Autofocus/Auto Exposure 10mm and 16mm Tubes Can Be Used Individually or Combined Metal Mount Lightweight Design Via B&H Photo