Last time I mentioned that it "should cover just fine at infinity" but I didn't expressly show it - I only posted an image with a very close focus.
I went back into my archive and found a better example for you. Here is an 8x10 image shot at infinity with the 90mm XL and I have inscribed a rectangle of exactly 6.5" x 8.5." This is accomplished by knowing what DPI the scan was done at and properly sizing the rectangle in PS. As you can see, it covers the rectangle fine. Of course others may tell you the circle of "acceptable definition" is smaller than the actual thrown image.
If you get a 90mm XL make sure you get a newer one with the removable rear shroud. I assume the rear shroud shrinks the IC slightly from mechanical vignetting, but I haven't actually tested this. I always have the rear shroud off when I've put this lens on 8x10.
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