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Appropriate to lens: 300mm F2.8L USM, 400mm F2.8L USM, 400mm F5.6LU, 500mm F4.5L, 600mm F4.0L, 1200mm F5.6LU, 70-200mm F2.8L, 100-400mm F5.6L and 180mm F3.5L
Requires manual focus when used with EF 400mm F5.6LU, 500mm F4.5L, 1200mm F5.6LU and 100-400mm F4.5-5.6L
Requires manual focus when used with EF 400mm F5.6LU, 500mm F4.5L, 1200mm F5.6LU and 100-400mm F4.5-5.6L
Focal Length & Maximum Aperture : Magnification: 1.4x
Lens Construction : 5 elements in 4 groups
Lens Construction : 5 elements in 4 groups
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