My single-coated 80-degree 210 mm Fujinon W is not on a lensboard right now, but I just evaluated mechanical vignetting at various apertures. Stopping down below f/22 permits an increasingly unobstructed light path, i.e. ability to project a larger circle, all the way down to f/64, although a standard-ring B+W filter would vignette below f/45.
Even for contact prints, I wouldn't count on more than Fuji's specified 352 mm. Although it will light up more diameter, field curvature and sharpness falloff in the corners probably won't meet my standards. I've previously confirmed this with my 250 mm f/6.7 single-coated 80-degree Fujinon W. Just beyond its 298 mm circle, everything falls apart, even though there's not much loss of brightness.
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