Prime lenses have a fixed focal length, meaning they do not zoom in or out. Prime lenses are great for portraitur… | Nhiếp ảnh sáng tạo, Nhiếp ảnh, Nhiếp ảnh cơ bản
2015 Roundups: Fixed Prime Lens Cameras: Digital Photography Review
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Canon EF 50mm f/1.8 Fixed Focal Length Lens - Walmart.com