Novoflex Auto Bellows for L-Mount

The only choices for L Mount

There are no other extension tubes for L Mount. The minimum extension is about 78mm - rather long. The Novoflex Automatic Reverse Adapter for L-Mount is half the price and covers some of the same ground. I needed to locate the 2nd principal plane of some lenses. The reverse adapter works better for that, handling short focal length lenses. I didn't try to use it for macro photography