Quote Originally Posted by Ari View Post
You will need a recessed board for the 90mm; what's more you may have to slide the standards together, i.e. move the tripod mounting block behind the two standards, in order to focus the 90 at infinity.
Ari, I learned that trick the hard way. My first 4x5 was a Cambo SC. I put a 90 on it and moved the standards as close as I could get them. I still could not focus at infinity. After a bit of cussing I looked it up on the internet and learned the trick. I felt kind of stupid after that.