Canon WD-H37C-II Wide-Angle Converter Lens
Canon's WD-H37 II 37mm Wide Angle Conversion Lens is specially designed for use with HD camcorders. Just attach the WD-H37 II to the front filter ring (37mm) of a compatible camcorder's original lens and you're ready to capture those wide angle shots. The lens features 0.7x magnification and has 3 elements in 3 groups. The following Canon camcorders are compatible: HG20, HG21, DC40, HF10, HR10, DC50, HF100, HV10 & HF11.