Quote Originally Posted by Dan Fromm View Post
If you're lucky the TTH Series IX will cover 45 degrees. If so, it will cover a 21 inch circle.

Sandholm, a 30 inch lens that covers 20 x 30 inches at infinity covers 62 degrees. Few ancient process lenses have that much coverage. Process lenses coverage is conventionally given for 1:1, not infinity. This has confused many innocents.
Well, its not me its the http://www.allenrumme.com/lensdb/DBIntro-1.html and the 12 lenses I have are correct listed in the database.

If you doubt, check which source he got it from and ask them.