Optimised for x4 to 15x. Bob can tell you the optimum magnification (I think it is 6x or 8x). Its not bad, I can't lay my hands on the other test prints I have done at the moment.
Not up to Schneider Apo, or Componon-S 150mm standards, but similar to modern Rodagon and Nikkor 135mm performance. Better than a plain Componon 150mm.
Just lost the long reply I typed, while trying to attach a photo!! Short answer, compared to a Schneider Componon-S 80mm at f5.6, the 120mm is better when used at f11. Very similar to the 80mm at f6.3 and f8. 80mm more contrast than 120mm, but resolution on my test neg (mamiya 7 with standard lens, Delta 100asa, tripod+hood) nothing really in it. 80mm slightly better resolution when using 6x loupe on a ~5.5x enlarged print. Can't find my 135mm lens prints at the same enlargement I did with the 120mm lens. The 80mm lens prints I produced the same size enlargements, at the same time, as the 120mm prints.
Thanks, very helpful.
Sorry for the really late update. Just compared the 120mm with a Nikon 135mm and Schneider componon-S 150mm. Resolution wise - looking at x5.3, 6.2 and 7.1 prints with a Schneider x6 loupe, there is nothing in it between the lenses. However, the 120mm being a slightly older design (methinks) the 135mm and 150mm produce a slightly more contrasty print. This is probably down to improved coatings on the newer lens.
Recently I finally found a 120 WA, I could try testing its performance compared to Rodagon 150 for 4x5 color negatives.
If the Rodagon-WA has improved coatings over my Eurygon 120mm, I would guess (if they are both decent samples), you will not see any difference in the prints. But like me, you have got to do it, just to check!
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