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Sigma 50mm F1.4 EX DG Filter Size 77 Interchangeable Lens for Canon AF: Amazon.co.uk: Electronics & Photo
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Amazon.com : Canon EF 50mm f/1.4 USM Standard & Medium Telephoto Lens with UV Protection Lens Filter - 58 mm : Electronics
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Canon FD 50 f1.4 lens review on Sony A7s and Sony a6000 - The Weekend Lens - Photography || Vintage Lens Reviews || Sony E-mount
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