Sigma's 17mm F4 DG DN is a lightweight compact lens with all-metal construction, a clickable aperture ring and thoughtful design touches such as a magnetic lens cap and metal lens hood. It's either a wide-angle prime for full-frame cameras or a walkabout 25.5mm equivalent on APS-C models. It measures 64mm wide and 49mm long (2.5 x 1.9") and can focus as close as 12cm (4.8") to give a 1:3.6x magnification ratio. It's not every day that a 17mm prime comes across our desk, so we took it to the stre...
Sigma's 17mm F4 DG DN is a lightweight compact lens with all-metal construction, a clickable aperture ring and thoughtful design touches such as a magnetic lens cap and metal lens hood. It's either a wide-angle prime for full-frame cameras or a walkabout 25.5mm equivalent on APS-C models. It measures 64mm wide and 49mm long (2.5 x 1.9") and can focus as close as 12cm (4.8") to give a 1:3.6x magnification ratio. It's not every day that a 17mm prime comes across our desk, so we took it to the stre...
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