Futurelooks.com - The Canon WD-H37 is one of few wide angle lenses available from Canon for a couple of the HG series camcorders (HG10/HG20) that use a 37mm filter size. The lens gives a 0.7x wide angle factor that is great for making your camcorder much more useable in tight quarters.
Camcorders that also use the 37mm filter size are the HF10, HF11 and HF100 camcorders. Although Canon doesn't recommend this lens for the VIXIA HF series camcorders with the 37mm lens, it definitely screws on and based on my experience it definitely works and is way cheaper than the official WD-H37C and WD-H37MK2 lenses that Canon says are compatible with the HF series machines.
*Some shots in this video were done with a Flip Mino HD