Hi! Thank you all for your replies.
I have done some digging into the history of the Raynox 0.66 Wideangle lens.
Bluenoser23 is right they have only been released for cameras in 52mm and 58mm. They have been marketed progressively as an HD 0.66 Wide Angle; HD-6600PRO and DCR-6600PRO in 52mm and the latest Aust. release in 58mm as an SRW-6600-58LE
I have a contact at Raynox Aust. He suggested that they were in fact all the same lens and specifications. In his words the changes were "just a sort of marketing ploy" Which I don't consider it to be a ploy. Simply updating to a more relevant labeling of a very good lens which has stood the test of time.
When offered this 55mm mount lens, which I have yet to see. I got in touch with my contact. Who suggested I simply pick up a step ring locally.
On delving further, Raynox released lenses with the same specifications for camcorders. These have mounting threads of 43mm; 49mm; 52mm; 55mm and 58mm. So it would appear the lens on offer is one made for a camcorder.
Jon, I respect and hold your opinion very highly, and will most certainly heed your advise. Am I wrong in thinking that either of the camcorder 52mm, 55mm or 58mm lenses could be successfully mounted onto the canon S5IS?
bob (d.o.f.)