This is the new Meike 3.5mm f/2.8 Circular Fisheye

Full info at MeikeGlobal.

Meike 3.5mm f/2.8 key features:

• Focal Length: 3.5mm
• Lens Construction: 10 elements in 7 groups
• Maximum Aperture: f/2.8
• Minimum Aperture: f/16
• Focusing: Manual Focus
• Minimum Focus Distance: 9.5cm
• Field of View (Micro Four Thirds): Diagonal 220° Horizontal 220° Vertical 220°
• Weight: Approx. 190g

via ePhotozine