I have not compared both far beyond 1:1, but given how much you end up closing the aperture, most of the time, I don’t know that any significant difference will show up. Do you know from experience that they are going to perform differently for any practical purposes within that range?
The Nikkor is a symmetrical design and according to this also optimized between 1:5 to 5:1:
http://www.naturfotograf.com/lens_LF.html
“The AM Nikkors (there also is a big brother, the 210 AM) are designed for close-ups with peak performance in the range 1:5 to 5:1 magnification. “
However I can’t claim it’s accurate.
Ultimately I don’t think you can optimize a lens design over such a wide range. You have an optimum magnification performance always, and then performance degrades around there. I suspect the quoted range of magnifications is the window over which the performance is acceptable, but it doesn’t mean that it’s constant across 1:5 to 5:1.
In the end, Bob, I am just trying to make OP aware of this option which is more economical while being responsive of his original request for “1:1 magnification”.
I love my Schneider 150mm f/9 g-claron lens, a process lens w/ a simple design and optimized for flat surfaces at 1:1. (But I love it even more for its tiny size, light weight, and general landscape use – it goes into my pack on one-lens backpacking trips if I see strenuous climbing on the map.)
It has moderate coverage for 4x5 (about 190mm), but the longer FL g-clarons can work with 5x7 and I think 8x10. It's easy to focus in brighter conditions, and I've never shot it wider than f/22 – I suspect its image quality might quickly drop-off if I opened-up closer to its widest f/9 aperture. Maybe I'll try some day.
Here's an image approaching 1:1 – the lovely bark of a ponderosa pine. I added more than a stop for compensation. The small-and-light lens makes demanding macro work easier, though I don’t remember this shot being too difficult. I asked the ponderosa to remain as still as possible and it cooperated.
Tachi 4x5
Schneider 150mm/9 g-claron
Ilford HP5+ (in Kodak HC-110)
Epson 4990/Epson Scan
One sells used for about $600.00 and the other about $900.00. The more expensive one far outsold the cheaper one. Performance accounts for that difference. Plus Rodenstock actively pursued large format sales. Nikon didn’t. Their efforts went into 35mm, microscopes, etc..
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