You may be right but I tried my 55mm f/2.8 Micro Nikkor, and a bunch of others including a Summicron 50mm and a 50mm f/1.4 Nikkor. Can't say I saw much of a difference. I assumed that since the Tessar is fixed focus and doesn't have a focusing helical, it was likely an enlarging lens. I suppose I should just get off my butt and unpack my new Epson and do the scans correctly... but that just isn't as much fun.
🙂 If you can't see much difference, you're definitely doing something wrong! My Summicron and 50/1.4 Nikkor were both disasters, especially at the edges. Take a look at my Flickr stuff--you should be getting good grain resolution equally the same all across, from corner to corner. I'm thinking with a camera upgrade from my current 12Mp, it will be even better.
Regarding sharpening problems: at better resolutions you can't sharpen copies of B/W negs because what the sharpening process sees as "detail" is the grain, and all it does is sharpen and increase it. I have my D300 set to a more or less neutral position, with a small amount of sharpening, and that's all the sharpening they get. If you are working at lower resolutions, where the grain isn't resolved, you can run a sharpening routine and it will have some good effect on the detail.
If you're using something like a G11 to "scan", it just isn't going to dig into the detail of the film, and the results are going to look "digital". You can blame the camera for that if you want, but since you called BS on my process, I guess I will call BS on your observation.
🙂 Properly done, film scans with camera look great, and very much like my silver prints. . . . or better, because I do much more "darkroom" work on them. I don't think anyone will accuse my film/camera scans of being "digital" looking!
I will say, however, that this is a highly technical process, perhaps beyond the abilities of a lot of people who are trying it, based on what I'm reading in this thread.