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Part Number: 824940Brand: Sigma
The 1.4 EX is placed between the lens and the camera, and 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.
SIGMA / SONY / NIKON / CANON
*Dimensions and weight include the SIGMA mount.
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