Hi Dick
I'm puzzled by your 1:1 comment and macro lenses.
Many macro lenses don't focus to 1:1, including the Hasselblad Zeiss 120mm macro, as well as a whole generation of Nikkor micro lenses (55mm and 105mm), as well as the old superb Minolta macro lenses etc.
It was common for most of these to have a 1:2 reproduction ratio unless dedicated close-up rings were used.
I think the most important characteristic is that a macro behave in a "planar" fashion akin to a repro lens, having a "flat-focus" field and corner to corner sharpness without distortion. This separates it from many "macro-zooms".
The Zeiss luminar lenses were wonderful, but it is almost easier to use a stereo microscope with cold-light source for such photos.
Just my 2c, S