I bought a cheaper wide angle lens over the internet and noticed the poor quality compared with using my Canon HF100 camcorder without it, very noticible on any zooming. ( I mean blurred images).
This Raynox lens came to my attention in a couple of reviews - someone experiencing exactly the same problem as me and I have to say the quality of the Raynox is good. It is not too cumbersome and works well even when zoomed, which is where wide angle lenses fall down.
Why Four stars?....The plastic adapter rings suppied are just asking to get cross threaded, so only 4/5
Set against my previous experience, this represents very good value and I bet the other reviewers are correct that Canon's own wide angle offering at twice the price is no better.
IN A NUTSHELL... Sharp Value.