Fujifilm 0.79x Wide conversion lens 55mm With Adapter Ring | eBay
The Zomei 0.45x wide adapter.: Nikon 1 System Talk Forum: Digital Photography Review
Amazon.co.jp: My Lens JTT Online MLE62W07 Wide Angle 0.7x Thin Wide Conversion Lens for Camcorders Lens Diameter 52mm 55mm 58mm 62mm Compatible with Full HD VIDEO : Electronics