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Canon EF 16-35mm f4 L IS USM Lens – Cambrian Photography
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Canon Zoom Lens EF 28-90mm 1:4-5.6 USM Ultrasonic 58mm AF READ | eBay
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Canon EF 70-300mm f4-5.6 L IS USM Lens – Cambrian Photography
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What do the letters USM on your Canon SLR camera lens mean? – SLR Photography Guide
Canon EF 24-70mm f/2.8L II USM | London Camera Exchange
Buy Canon EF-S 10-22mm f/3.5-4.5 USM Lens — Canon UK Store
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Buy Canon EF 100mm f/2.8L Macro IS USM Lens — Canon UK Store
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