Summary: I bought this for my new HDV FX1 Camcorder, and it works great. Unlike the Century wide-angle lens, this is fully zoom-through. Lens is .8x, which is less than the Century and others, but just about right for HD--since the FX1 already can do a pretty decent wide shot when the zoom is fully backed out, this just gives it an extra boost, converting the camera view from roughly a 35mm lens on a 35mm camera to about a 28mm. Also, very little barrel distortion.
Summary: I concur. I've just found out the hard way too. I bought the (without K) version on ebay and it doesn't fit my Sony NXCAM NX5 whereas my camera manual's accessories list includes the VCL-HG0872K. The screw fitting looks like it should engage with the camera's G lens but the lip on the WA lens is too deep. Oh yes....and the price difference is quite noticeable too.
Beware VCL-HG0872k and VCL-HG0872 are very different!
D. MacLaren, Amazon
15 May 2013
Summary: At the time of writing this product is labelled VCL-HG0872k. Please note that this is NOT what is pictured. The lens pictured (with the circular shade) is the VCL-HG0872 (without the 'k') This model has a screw thread to attach it to the camcorder. The VCL-HG0872k has a bayonet attachment, and is a quite different shape. If you want confirmation, enter these two different product names into Google images! I learnt this the hard way...