We are still talking 35mm here, aren't we? The film is so grainy that it looks bad at anything bigger than 11x14 anyway, and I've not owned a top-line lens from Nikon or Olympus that wasn't sharper than the film. By top-line the high-end lenses in the line - primes and pro-level zooms, not the crappy plastic kit zooms.
If grain is bad, then 35mm will never be able to satisfy you in a 16x20 print. I've owned many of the top-line Nikon lenses, and in my experience they are bettered by the Zeiss ZM, Contax G and Leica. Even when using HP5 @ ISO 800 the difference is apparent.
I shoot 35mm for speed, not quality. For that I use medium format. My Mamiya 645 will blow away ANYTHING you can get from a Leica (or any other 35mm for that matter). 35mm sucks for quality (I am picky though), and I have a hard time understanding people acting so silly over 35mm format lenses.
I don't want to get sucked into this '120 is just better' argument again. If it works better for you hauling around all those big lenses, big body and a bunch of backs to get prints you like better great. I've seen better prints off my current lenses than anything else from roll film (Hasselblad, Pentax 67, Mamiya RZ, Fuji 645). If the argument is quality alone 8x10 wins hands down.
😀 For me the compromises 120 brings to the table in weight, depth of field and ergonomics negate the slightly larger negative. I shoot for quality regardless of format, and find that my current lenses work, period.
A leica lens costs, what, $3000 for a 50mm Summicron? A $400 Mamiya lens on 120 film beats it anyday. not because the Summicon is a bad lens. It isn't and is probably a better lens (I know the Mamiya 80/1.9 I have isn't the best because my Hasselblad's 80 is sharper), but 35mm film just isn't capable of the detail resolution such a lens delivers.
I don't know where you shop, but I certainly haven't paid $3000 for any lens (so no, I don't have a Noctilux
🙄 ). Again, it comes down to what we shoot as to what lens will be better. When looking at full size prints side by side and one has crisper detail in the corners I will choose the lens that made the crisper print over the less crisp one, because many of my images make use of detail from corner to corner.
Believe me I know I'm not going to convert anyone, and would expect the same consideration in return. I'm using the lenses I'm using because they work for me. I'm not saying they must work for you. I'm just stating my opinion not stating facts that apply to everyone.