Macro extension tubes for the NEX E-mount are finally available. Macro tubes move the lens farther away from the sensor which allows for closer focusing which means higher magnification of the image. The tubes are hollow and have no optical elements to degrade the image.
The current NEX macro tubes do not have electrical contacts, therefore the 16mm Pancake, 18-55mm OSS Zoom, and the 18-200mm OSS Zoom lenses will not work with the macro tubes. Adapted lenses will work great with them, NEX-C3 to Macro Tubes to E-mount lens adapter to adapted lens.
This will be very helpful for rangefinder lenses and their large minimum focus distance (MFD).
Sony NEX Macro Extension Tubes are available on eBay.