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The Sigma 18-50mm F2.8 DC DN Contemporary is a constant-aperture standard zoom for Canon RF-mount APS-C mirrorless bodies, covering a full-frame-equivalent 28.8-80mm. Its main draw is the combination of F2.8 across the zoom range in a body small and light enough to leave on the camera. It focuses down to 12.1cm with 1:2.8 magnification, so it doubles as a close-up lens. Against Canon's own RF-S kit zooms it gives up image stabilization and a wider zoom range but gains a stop or more of light and much better subject separation.
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Lowest price we've seen: $499.00 on Nov 12 at Sigma Corporation of America. Tracked across 14 stores since Nov 12.
Owners rate it highly as a small, sharp, fast standard zoom that stays on the camera. Praise centers on image quality wide open and the light weight; the main complaints are the lack of stabilization and the limited zoom reach.
The SIGMA 18-50mm F2.8 DC DN Contemporary is a standard zoom lens for APS-C mirrorless cameras, in Canon RF mount. It is Sigma's first zoom lens made specifically for APS-C mirrorless cameras. The zoom range is equivalent to 28.8mm to 80mm on a full-frame camera.
The aperture stays at F2.8 across the whole zoom range. The minimum focusing distance is 12.1cm and the maximum magnification is 1:2.8, so it can be used for close-ups. The lens measures 69.2mm at its widest and 74.5mm long, and weighs 300g.
The autofocus drive and communication speed were optimized for Canon RF mount mirrorless cameras. The lens supports high-speed AF, Servo AF and in-camera aberration correction. The mount is rubber-sealed for use in a variety of environments.
