Sloppy is as sloppy does. Why even bother buying a nice camera and expensive lenses if you let your cat cough up hairballs in the darkroom,
and if you think your "image" is so "important" that it will be miraculously enhanced by all kinds of technical flaws. Or maybe you just happen
to love endless hours of spotting. Check out any cleanroom catalog or website. I use triple filtered air lines, plus a true HEPA vac (not one of those Cheapo Depot things), plus an electrostatic industrial air cleaner, plus a 100% dacron cleanroom smock, plus enameled walls, etc etc etc. And the whole nine yards probably cost less than another fancy lens which I didn't need anyway.