Canon FDn 28-85mm f/4 is standard zoom lens for Canon FD New 35mm SLR cameras.
This lens covers the most frequently used focal lengths and with its zoom ratio of 3, rivals the excellent standard zooms. Canon uses three group zooming system optimally corrects all aberrations and allows light weight, compact construction. A built-in movable flare-stopper minimises undesirable incident rays to maintain flare-free excellent optical performance.The built-in macro capability permits close-up photography over the entire zoom range. A minimum film-to-subject shooting distance of 50mm is possible at the short telephoto extremity of 85mm (with a magnification ratio of 0.2X). Constant aperture of f4.0 is maintained throughout the zoom range.