Really? Are you sure?

I know most feel it's of critical importance, but perhaps you can explain how this lens:

(and a Componon, no less, not even a Symmar) on 8x10 can make images that are razor sharp:

yes I know about the vignetting, it was hard enough composing in very dim light, exposure was in the 20-30 second range. There's a resounding belief that if your lens isn't absolutely perfect, that it's useless. While I'd love to have everybody believe that, as it would cost me far less to buy odds and ends, it's not always true. Granted, at 10x, which in this case would put us at a 80x100 inch print, you would likely see some effect, I'd imagine.