Guess I'll join the Sigma frey ... I have a 16mm f/2.8 Sigma that covers about 180 degrees on the diagonal of a 24x36 frame ... but I have used it on a 31/4 x 41/4 Polaroid back modified so it would accept the Canon FD mount lenses and which I could also use sheet film with. The lens was superb and delivered a 45 mm image circle covering 180 degrees along any diagonal. So a "fisheye" when recording the full image circle. Granted that at 2.8 it was a bit soft but at f/8 it was fantastic.
Andy
Soft is not necessarily bad ... use softness to advantage or just deal with it ... excellent photographs were made with rudimentary equipment and these days the soft focus Holga and Diana and Lens Baby lenses are all the rage! :)
-------- Original Message --------
Subject: Re: Lens Question
From: Jan Faul <jan@xxxxxxxxxxx>
My 18mm from 1972 was used for a portrait of Joe Hirschhorn and it so soft I am embarrassed. I shot it at f11, but it did not help.
