http://www.photographyblog.com/news/horseman_conversion_lenses_for_dslrs/Direct Source Marketing, the sole US distributor of Horseman photo products for professionals and high-end consumers, today announced unique multi-coated conversion lenses for DSLR cameras. These conversion lenses, all made in Japan by Komamura Corporation, provide wide-angle and macro solutions without changing lenses. They are attached in front of the taking lens, much like a filter.
Hmm, is this sort of thing worth looking at? I'd always been put off because of the cheapness, but this is advertising that its aimed at " professionals and high-end consumers" so now I'm unsure!