| Focal Length 35mm Equivalent Focal Length
 | 150-400mm(with a built-in teleconverter: 187.5-500mm) 300-800mm equivalent(with a built-in teleconverter: 375-1000mm)
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| 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)
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| Splashproof Type / Dustproof | IEC Standard publication 60529 IPX1 (applies when the lens is used with Olympus splashproof Body) / Dustproof construction
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| 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 (with / without a built-in teleconverter, throughout the zoom range) | 
| Maximum Image Magnification 35mm Equivalent Max. Image Magnification
 | Wide:0.12x / Tele:0.29x (with a built-in teleconverter: Wide:0.15x / Tele:0.36x) Wide:0.25x / Tele:0.57x (with a built-in teleconverter: Wide:0.31x / Tele:0.71x)
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| 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)
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| 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. 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 | 
| Dimensions | Ø115.8×314.3mm | 
| Weight | 1,875g (without Lens Cap, Lens Rear Cap and Lens Hood) | 
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