Summary: I'm very happy with the tele-conveter. The image quality seems unaffected by the lens extender and the added telephoto reach is just what I was looking for. The lens is significantly heavy and with the weight and extended telephoto view, hand holding the camera is really not possible if you want a shake free image. I've found that bracing the camera on a solid object produces and okay image but best results are with a tripod.
Summary: I use this lens at maximum zoom most of the time for filming baseball players. There is little to no distortion even at high levels of magnification. The only negatives are that the lens is heavy (which is not an issue for me) and the image stabilization doesn't work (well) at maximum magnification (which is an issue for me).
Summary: The review above hits the nail on the head. My first thought when I received the lens was "wow, that big" It is not a problem, just an observation. You will need to use a tripod or monopod with this lens. To be honest I could barely tell the difference with the lens on and off. Images are slightly sharper and magnified just a bit. The real benefit seems to be a sharper image from tight to med-wide (as far as you can go without vignetting).
Summary: If you are considering this lens, you should know four things about it to avoid disappointment: 1) It's large and heavy enough to change the balance of the camcorder -- it's the same weight as the WD-H43 Canon wide angle teleconverter, about which you read the same comments. 2) It will block the edges of the field when you zoom out. That is, some of the image will be black when you zoom out.
Excerpt: ...Ho installato questo convertitore sulla mia videocamera Canon HV20. Se si sta prendendo in considerazione questo obiettivo, si dovrebbero sapere alcune cose su di esso per evitare delusioni: Innanzitutto è grande e pesante abbastanza da cambiare il bila ...