Canon EF 50mm f/1.8 STM Lens. The EF 50mm f/1.8 STM blurs the background behind your subject so they really stand out. Canon EF Mount Lenses. Canon EF 50mm f/1.8 STM Lens Key Features The diminutive EF 50mm f/1.8 STM weighs just 160g and is only 40mm long, so you’ll always have room for it in your bag.
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