When trying to add this WA adaptor to a Canon Professional Services application there was a mandatory field for a serial number, but I can't see one on the lens. Anyone see a S/N on theirs?

Did it come on the paperwork in the box.

Colin

There is nothing on the lens, but on the carton there are three numbers in a box. The top one is the Canon part number, one of the others could be the serial number.

Thanks, Davids. I normally keep all packaging, but I can't seem to find to find the box for the WD-H72 at the moment.

While clearing out a cupboard I found the box for the WD-H72. It has the number on it right enough. Thanks again.