More on Amazon.com : http://www.amazon.com/gp/product/B000A1SZ9W?tag=thefatkidin06-20
Raynox HD-6600PRO 0.66x 52mm High Quality Wide Angle Lens Mounting Thread
Raynox HD-6600 Pro 52
52mm Super Quality Wide Angle Lens 066X
Nominal 066XActual 066Xdiagonal 066XcenterOptional
Front filter size is 72mm
Mounting threads is 52mm