There were two 180mm Fujinon W designs. The older, non-multi-coated one would cover 8 x 10 with some movement if stopped down to f16 or 22. The newer, multi-coated lens will not cover 8 x 10. So, how do you tell them apart? Easy. The older lenses have the name and focal length on the retaining ring around the front element. The later design had the text on the outside of the front cell. Also, the serial numbers for the older lenses are on the front, with the rest of the name and description; on the newer lenses, they are on the outside of the rear cell.

The coverage of the old lenses were 80 deg. The newer design only covered 72 deg. You can calculate the image circle from that if you're any good with trig.