View Full Version : Question for the lens gurus...

Bob Fowler
30-Jan-2006, 18:43
Reading through Jay Allen's book "Pictorial and Soft Focus Lenses of the Past", I noticed that in the section on the Wollensak Veritar (pg 47) it says "The Portrait Veritar differs from an ordinary anastigmat lens in that as the lens is stopped down the depth of field increases only behind the point focused on."

Is that because of the placement of the iris? If so, is the iris closer to the front than normal or closer to the rear? Am I missing something else?

Michael Gudzinowicz
30-Jan-2006, 19:24
The Veritar relies on spherical aberration to produce the soft focus effect.
A fairly good example of what is involved may be found at the following URL:

A desciption of the Veritar lens may be found at:

Bob Fowler
31-Jan-2006, 06:25
Thanks Mike, I think I have a handle on it now.