Specifications #REF! Focal Length 150-400mm (with a built-in teleconverter :187.5-500mm) 35mm Equivalent Focal Length 300-800mm (with a built-in teleconverter : 375-1,000mm) Lens Construction 28 elements in 18 groups (Built-in teleconverter : 7 elements in 4 groups) (1 EDA lens, 4 Super ED lenses, 2 ED lenses, 2 HR lenses, 1 HD lens) Splashproof Type / Dustproof "IEC Standard publication 60529 IPX1 (applies when the lens is used with Olympus splashproof Body) / Dustproof construction" Focusing System High-speed Imager AF (MSC) Angle of View 8.2 degrees - 3.1 degrees (with a built-in teleconverter : 6.6 degrees - 2.5 degrees) Closest Focusing Distance 1.3m (across the entire zoom range when a built-in teleconverter is used or not) Maximum Image Magnification Wide:0.12x / Tele:0.29x (with a built-in teleconverter : Wide:0.15x / Tele:0.36x) 35mm Equivalent Max. Image Magnification Wide:0.25x / Tele:0.57x (with a built-in teleconverter : Wide:0.31x / Tele:0.71x) Minimum Field Size Wide:139.5×104.8mm / Tele:60.7×45.6mm (with a built-in teleconverter : Wide:111.6×83.9mm / Tele:48.6×36.5mm) Number of Blades 9 (circular aperture diaphragm) Maximum Aperture F4.5 (with a built-in teleconverter : F5.6) Minimum Aperture F22 (with a built-in teleconverter : F29) Lens IS Mechanism VCM IS Performance 5-axis sync IS 8 steps* * According to CIPA standards. When attached to OM-D E-M1X, with yaw and pitch applied to camera, half-press IS set to Off, and focal length set to 150mm. (without a built-in teleconverter) 5-axis sync IS 6 steps* * According to CIPA standards. When attached to OM-D E-M1X, with yaw and pitch applied to camera, half-press IS set to Off, and focal length set to 400mm. (with a built-in teleconverter : 500mm) "Lens IS 4.5 steps* *Focal length : 400mm (with a built-in teleconverter : 500mm)" Filter Size Diameter 95 mm Lens hood Dimensions ?115.8×314.3mm Weight 1,875g (without Lens Cap, Lens Rear Cap and Lens Hood) Box Contents LH-115 Lens Hood, LC-115 Lens Cap, LR-2 Lens Rear Cap, LSC-1642 Lens Case, CSS-P121 Lens Strap, Instruction Manual, Warranty Card Specifications and design are subject to change without notice. Separately availbale accessories Zuiko PRF-ZD95 PRO Protection Filter, LH-115 Lens Hood, LC-115 Lens Cap, LR-2 Lens Rear Cap, LSC-1642 Lens Case, CSS-P121 Lens Strap with MC-14 Focal Length 210-560mm (with a built-in teleconverter :262.5-700mm) 35mm Equivalent Focal Length 420-1,120mm (with a built-in teleconverter : 525-1,400mm) Angle of View 5.9 degrees - 2.2 degrees (with a built-in teleconverter : 4.7 degrees - 1.8 degrees) Closest Focusing Distance Approx. 1.3m (across the entire zoom range when a built-in teleconverter is used or not) Maximum Image Magnification Wide:0.18x/ Tele:0.40x (with a built-in teleconverter Wide:0.22x/Tele:0.50x) 35mm Equivalent Max. Image Magnification Wide:0.35x/ Tele:0.81x (with a built-in teleconverter Wide:0.44x/Tele:1.01x) Minimum Field Size Wide:98.8×74.3mm / Tele:42.9×32.3mm (with a built-in teleconverter Wide:79.1×59.4mm/ Tele:34.3×25.8mm) Maximum Aperture F6.3 (with a built-in teleconverter : F8.0) Minimum Aperture F22 (with a built-in teleconverter : F29) with MC-20 Focal Length 300-800mm (with a built-in teleconverter :375-1,000mm) 35mm Equivalent Focal Length 600-1,600mm (with a built-in teleconverter : 750-2,000mm) Angle of View 4.1 degrees - 1.5 degrees (with a built-in teleconverter : 3.3 degrees - 1.2 degrees) Closest Focusing Distance 1.3m (across the entire zoom range when a built-in teleconverter is used or not) Maximum Image Magnification Wide:0.25x/ Tele:0.57x (with a built-in teleconverter Wide:0.31x/Tele:0.71x) 35mm Equivalent Max. Image Magnification Wide:0.50x/ Tele:1.14x (with a built-in teleconverter Wide:0.62x/Tele:1.43x) Minimum Field Size Wide:69.9×52.5mm / Tele:30.3×22.8mm (with a built-in teleconverter Wide:55.9×42.0mm/ Tele:24.3×18.2mm) Maximum Aperture F9.0 (with a built-in teleconverter : F11) Minimum Aperture F22 (with a built-in teleconverter : F29) IS Performance 5-axis sync IS 7 steps* * According to CIPA standards. When attached to OM-D E-M1X, with yaw and pitch applied to camera, half-press IS set to Off, and focal length set to 300mm. (without a built-in teleconverter) IS Performance 5-axis sync IS 5 steps* * According to CIPA standards. When attached to OM-D E-M1X, with yaw and pitch applied to camera, half-press IS set to Off, and focal length set to 1000mm. (with a built-in teleconverter)