EXPAND YOUR FIELD OF PHOTOGRAPHYDouble the focal length of the M.Zuiko Digital ED 40-150mm F2.8 PRO or M.Zuiko Digital ED 300mm F4.0 IS PRO lens with the MC-20 2x teleconverter. Maintain outstanding image quality, high speed AF, and image stabilization performance while carrying a minimal amount of additional gear. Enjoy the same level of dustproof, splashproof, and freezeproof performance standard on all M.Zuiko PRO lenses. KEY FEATURES: • Expands Field of Photography • Outstanding Optical Performance • Fast AF Performance • Excellent Handheld Shooting • Professional Weatherproof Construction Other notable features and specs: • Dust, Splash & Freezeproof Construction • Doubles focal length while maintaining the high image quality of the master lens. • Expands photographic area for super-telephoto and super-telephoto macro photography. • 9 elements & 4 groups. • Zero (Zuiko Extra Low Reflection) Coating reduces ghosts and flares. • High-magnification shooting while maintaining high image quality and fast AF • 5-Axis Image Stabilization performance when MC-20 is attached. • When used with M.Zuiko Digital 40-150mm F2.8 PRO Lens Maximum Image Magnification = 0.42X (35mm Equivalent = 0.84X) • When used with M.Zuiko Digital 300mm F4.0 IS PRO Lens Maximum Image Magnification = 0.48X (35mm Equivalent = 0.96X) • Ships with Lens Cap (BC-3), Rear Lens Cap (LR-2), Lens Case LSC-063, Manual and Warranty.