Just developed my first roll from my Minolta Autocord TLR. Under a lupe the negatives look impressive. I'm mostly a 35mm shooter and use an El-Nikkor 50/2.8 for enlarging I'm happy with. I know nothing about med format enlarging lenses but want something the equivalent in quality of my 50mm lens. In looking on ebay I'm totally confused. All the brands have different levels of lenses. The 80mm 5.6 seems to be more expensive than the f4 lenses. How many elements should I look for, etc? Some guidance would be appreciated.