I made shots to determine the field width of a Zuiko 14-54mm lens when set at the indicated marks of 35mm and 50mm. For comparison I made shots with a Rokkor 35-70mm (manual) lens at the same indicated focal lengths. At the 50mm indicated focal length I added a shot made with the new model Zuiko 40-150mm zoom. 8 Feb 09: I've added two more lenses at 50mm - an OM 50mm and a Rokkor 50mm macro lens