The Olympus OM Zuiko Auto-Macro MB 1:2/20 mm is the world's first macro lens with the Auto Bellows.
The lens can also be used with the Telescopic Auto Tube 65–116, but the range of approximation is smaller..
When shooting with Auto Bellows, the maximum scale is 1.8х2.6 mm and the magnification is 13.6x, the minimum scale is 5.7х8.6 cm and the magnification is 4.2x.
The lens is very rare on sale and is rather expensive.
At present such super magnification lenses are not manufactured.
Links to online resources:
Posted by: Zuiko Date of publication: 17.02.2013