The new Mitakon 20mm f/2 4.5X Super Macro Lens is now listed at BHphoto in two version: A-mount (Click here) and E-mount (Click here). This is what the lens does:
Offering a magnification range of 4.5x to 4x, and a minimum working distance of 0.8″, this lens is solely designed for producing greater-than-life-size images of small objects without the need of extension tubes or other accessories.
DC.watch posted a test made with this lens and here is how it looks on the Sony A7:
Image samples:
