I bought a cheaper wide angle lens and was amazed at the better image quality of this lens. I bought it for my Canon XA10 camcorder which it only fits when I've removed the grip with XLR connectors, the diameter goes from 5mm to large. However, this is a solid lens, well built and the resulting image/movie is excellent. It's heavier than the cheaper lens - a lot heavier, but I suspect the glass weighs a lot and contains a lot more glass than any other I've used. It didn't have any vignetting that the other lens I tried had when zoomed straight out. For the $199 I paid this was a good buy. .
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