Thanks for the responses. A couple of clarifications - I am not trying to use a 35mm SLR lens for enlarging, nor am I planning to stick with the Voss - I know it is junk. Which is why I have decided to get an El-Nikkor, Schneider, rodenstock or similar f2.8 lens and I am going to use it occasionally for macro as a reversed lens.

So my question is, among these lenses, which has the most rounded and most number of aperture blades?

Quote Originally Posted by Jim Jones
I've found fast lenses such as the Nikkor 50mm f/1.4 and a similar old Canon 50mm to be poor for macro work, reversed or not. It's not a matter of bokeh: nothing was as sharp as with a macro or good enlarging lens. However, don't throw away your Voss or Beslar lenses. In desperation they can be used as magnifiers.
I agree. I would get a 55/2.8 micro-nikkor but am exploring this option because I need to get a good enlarger lens anyway.

Lee and Jay, thanks for the recommendations. I'll look out for them on eBay.