28mm @ f/3.5 135mm @ f/5.6 Coverage. Flash coverage was fairly even at wide-angle with the Canon 28-135mm lens that will be bundled with the 7D as a kit in the US, but keep in mind that a 28mm ...
By 20mm, the lens is almost perfectly rectilinear, measuring +0.10% pincushion. It is then pincushion all the way, with +1.47% at 28mm and +1.54% at 35mm. Traditionally, wide-angle lenses would ...