Rick A
Subscriber
There's always been a bit of confusion about Fuji's 250mm lenses. There are actually THREE. The first is the W f6.7. It's loved by many because of its 398mm image circle.
There there is the NW f6.3 version -- which is simply marked "W". It adds EBC coating but has a smaller circle of 312mm.
There is a later CM-W f6.3 model with a circle of 320mm.
All of them will work well with 5x7, but each is different in optical design, lens coating, weight, size, filter thread, cost, availability, etc.
http://www.subclub.org/fujinon/byfl.htm
The one I own is the NW plasmat design with 312mm image circle. It weighs in at a pound and a half mounted on a Technica style lens board. I replaced it with a CaltarII-N 5.6/240mm (Rodenstock) that has a much larger image circle so I could use some movements on my 8x10.