Canon EF 200-400mm f/4L IS USM Extender 1.4X User Manual - Page 24

18. Extenders (Sold Separately) Lens specifications when using extender EF1.4x II/III or EF2x II/III are as follows. When the internal extender is set at 1x Extender EF1.4x II/III WIDE TELE Focal length (mm) Aperture Diagonal Angle of view Vertical Horizontal Maximum magnification (x) 280 f/5.6-45 8°50′ 4°55′ 7°20′ 0.15 560 f/5.6-45 4°25′ 2°25′ 3°40′ 0.22 When the internal extender is set at 1.4x Extender EF1.4x II/III WIDE TELE Focal length (mm) Aperture Diagonal Angle of view Vertical Horizontal Maximum magnification (x) 392 f/8-64 6°20′ 3°30′ 5°15′ 0.21 784 f/8-64 3°10′ 1°45′ 2°40′ 0.3 Extender EF2x II/III WIDE TELE 400 800 f/8-64 f/8-64 6°10′ 3°05′ 3°30′ 1°40′ 5°10′ 2°35′ 0.21 0.31 Extender EF2x II/III WIDE TELE 560 1120 f/11-91 f/11-91 4°25′ 2°10′ 2°25′ 1°15′ 3°40′ 1°50′ 0.3 0.44 ENG-23