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Cameras & Lenses » Camera Lenses » Converters » Sigma
The 1.4 EX is placed between the lens and the camera, and it allows the photographer to use the 70-200mm f/2.8 lens as a 98-280m f/4 lens, and the 300mm f/2.8 lens as a 420mm f/4 lens; the high optical performance is maintained and the AF speed is not affected. More
Lens construction: 5 elements in 3 groups
Focal length: 1.4x that of a master lens
Aperture coupling range: F2.8 - F32
Reproduction ratio: 1.4x that of a master lens
Dimensions: 68.5 X 19.5mm
Weight: 143g (5oz.)
Click here to see a list of compatible lenses.
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