Michael Briggs , Jun 24, 2006; 03:39 p.m.
Wooden field cameras are typically not made to the same precision as most metal view cameras. Your camera has the important aspects correct: the ground glass shows what you will get on the film, and the ground glass is correctly positioned to get accurate focus.
I used a Zone VI Classic for many years. One reason that I switched to a different camera was that it was akward to use with wide angle lenses. I bought mine fairly soon after it was designed and first released -- that was before Schneider designed the 58 mm Super-Angulon-XL. In that era 75 mm seemed really wide for 4x5 -- probably the widest lens in many amateur's kit was 90 mm.
The various field cameras sold under the Zone VI name are discussed at http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00Cilx