Quote Originally Posted by Dan Fromm View Post
Over time the 4.5ers were recomputed and their coverage grew.
When did this happen, is there some way to distinguish the 4.5ers? I have a 1920 Tessar, a 150/4.5, that I have yet to actually test, but I hope it covers 4x5" (or at least 9x12 cm) straight-on.