Opteka .35x High Definition II Super Wide Angle Panoramic Macro Fisheye Lens for Canon PowerShot G7 & G9 Digital Camera Opteka .35x HD2 Super Wide Angle Macro Fisheye Lens. Direct 52mm mount; Adapters for 58mm & 67mm included. High Definition II - 2 times the resolution of standard high definition lenses Professional High Speed Auto Focus, Full Panoramic Capability, High Quality Crystal Optics, & AF Infrared Compatible Lens front Thread 67mm, 8 Element Lens, 180Deg Degree Capability Warranty