The focal length determines the angle of view, which determines the subject distance required with perspective determined by that distance. The focal length is always a primary consideration when selecting the ideal lens for a particular use. These lenses are designed for "photographers who value the experience of taking a picture just as much as the quality of the results." Ĭharacteristics of the lenses in this series include small size, light weight, and affordable price.Īlso consistent with lenses in this series are precision metal build quality and excellent image quality (at f/3.2 in this case), with a useful focal length completing the very attractive Sigma 45mm F2.8 DG DN Contemporary Lens package. The Sigma 45mm F2.8 DG DN Contemporary Lens is a member of the Sigma "I series", "Premium Compact Primes" for mirrorless cameras.
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