If I may tag along this thread, I'm looking for advice on an either/or situation for my B-22XL. I currently print only 35mm with a 50/2.8 El-Nikkor, but am thinking about venturing into 645 or maybe 6x6 territory. I already have two lenses of the appropriate (give or take) focal length: an El-Omegar 75/3.5 and a Rodenstock OMEGAR 75/4.5. I only need one, so which one to keep? Is there a significant resolution/sharpness/contrast difference between them (I know that they're both lower end lenses, so it may very well be six of one/half-dozen of the other)?
The obvious answer would be to make prints with both and judge by my eyes, however 1. I don't have any 120 negs to try out, and 2. I only have a lensboard for one of them and don't want to bother getting the right size lensboard for the other to test if the conventional wisdom here is that there's little difference between the two lenses.
Thanks for your insight,