Ah !
the days of Film gets a mention, nearly 3 years since I last shot film.
When on 35mm I used 2 systems Canon & Olympus.
widest Canon was 24mm f2.8 then a 35 to 135
Widest Olympus 16mm full frame fish eye, 17mm tokina, 24mm f2.8, 35mm shift (Schneider pa curtagon), 35mm Novoflex macro .
The swap to Digital invovled getting a 14mm f2.8 and the 17mm to 40mm this has covered all but the fish eye.
one last point I use both a 1.6 x body and a 1.3x body so effectively each wide varies accordingly,
put the 14mm on the 1D mk2 and thats seriously wide (care needed with subjects at the edge of the frame etc).
Martin (Huckaback Photo)
Old photographers never die. They just go out of focus