Editorial Reviews:
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Increase the versatility by adding a Sigma EX Apo Tele-Converters to Sigma 180mm f3.5 EX lens. By using the 1.4x EX Apo Tele-Converter, you can increase the magnification to up to 1.4:1 or retain same life-size reproduction at an even greater working distance, great for photographing difficult subjects like butterflies or small animals, which can be difficult to approach.
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