Beware of this kind of evidence of what was, or was not made, by a manufacturer.JGVilla wrote: As you can see from the brochures the 68mm El Nikkor never existed. Must have been a typo.
I have two copies of a lens which was only in development in any Tamron brochure I have seen and the complete range of bellows leses is hard to find in Olympus OM brochures.
Harold