• Uses 3 SLD glass and 4 aspherical lenses to correct for aberrations. In particular, it has achieved high image quality even around the screen by correcting the coma aberration that degradates image reproduction and magnification chromatic aberration that does not improve even when squeezed • High resolution by using aspherical lenses with a large ratio of the center and peripheral thickness and very difficult to mold • Adopts a super multi-layer coating to reduce flare and ghosting and achieve high contrast images even when shooting in backlight • Canon EF Mount • 24-70mm F2.8