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![Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]](https://i0.wp.com/digital-photography-school.com/wp-content/uploads/2011/12/Peter-West-Carey-Bhutan2011-1022-9288.jpg?resize=600%2C587&ssl=1 "Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]")
Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]
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![Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]](https://i0.wp.com/digital-photography-school.com/wp-content/uploads/2011/12/Peter-West-Carey-Bhutan2011-1028-8927.jpg?resize=600%2C600&ssl=1 "Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]")
Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]
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![Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]](https://i0.wp.com/digital-photography-school.com/wp-content/uploads/2011/12/Peter-West-Carey-Bhutan2011-1027-8395.jpg?resize=600%2C600&ssl=1 "Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye [REVIEW]")