The 24-70mm f/2.8 lens is one of the most popular and important options out there, found in a huge range of genres and applications, where its combinations of a wide aperture and commonly used focal lengths make it a prized choice. That being said, such lenses tend to be rather expensive. Sigma's 28-70mm f/2.8 DG DN brings the price down by a significant amount by making a few clever compromises. This great video review takes a look at the sort of performance and image quality you can expect from it in usage.
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