Sigma’s 10-18mm F2.8 DC DN is a lightweight wide-angle lens with a 15-27mm equivalent focal length. It fills in the ultra-wide niche for L-mount APS-C and gives APS-C users of Sony’s E-mount and Fujifilm X-mount systems another wide zoom option. At first glance, it’s a very compact tiny lens that comfortably sits in the palm of your hand with room to spare. Besides the zoom and focus ring, the lens design is simple, with no focus selector switch or
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