wilt, y'r source is in error. Rodenstock claims 25" x 30" for the 600/9 Apo Ronar at 1:1, a tiny bit more than 24 x 30. It agrees with Rodenstock's claim that the lens will cover 14 x 17 at infinity. Re Rodenstock's claims, their Apo Ronar sheets are at https://onedrive.live.com/redir?res...35&authkey=!AESpkw0t4oWnLtY&ithint=folder,pdf. I borrowed them from Bob Salomon, to whom thanks are due, scanned and posted them. So what? The OP didn't want a closeup lens and 14 x 17 is smaller than 16 x 20.