The Sigma 90mm F2.8 DG DN Contemporary ($639) is another entry in the I Series, a family of compact, metal-barrel lenses for full-frame mirrorless cameras. Like others in the family, the 90mm F2.8 is made for photographers who want to pack small, lightweight kits, prefer fixed focal views to zoom, and appreciate on-lens aperture control. It's missing the extensive weather protection that Sigma puts in some of its other prime lenses, and doesn't gather as much light as peers like Sony's similarly affordable FE 85mm F1.8 or Panasonic Lumix S 85mm F1.8, but if you're in love with the look and feel of the I Series, those lenses won't do the trick.Aluminum Construction for an Old-School Feel The 90mm F2.8 follows the I Series design playbook closely. It's a short, squat lens, one that may be mistaken for vintage at a distance thanks to its piano black, anodized aluminum construction. It measures about 2.4 by 2.5 inches (HD) and weighs 10.4 ounces, balancing well on most full-frame mirr...
The Sigma 90mm F2.8 DG DN Contemporary looks and feels like a vintage lens, but inside you'll find a modern, superb optic. We love its images and close-up focus, but action photographers will want a short telephoto prime with faster focus.
Small, lightweight design; Strong resolution from center to edge; On-lens aperture control; 1:5 macro focus; Minimal focus breathing
Limited dust and splash protection; Autofocus not up to fast-action photography; Nonlinear focus and clicked f-stop not ideal for cinema