Sigma 18-35mm F1.8 DC HSM | Art

The fastest zoom for interchangeable lens cameras

The Sigma 18-35mm F1.8 caused a great deal of excitement when it was announced in April 2013, as the fastest SLR zoom ever made. This is key to its appeal - the large aperture means that it offers similar depth of field control to using an F2.8 zoom on a full frame camera, and in principle similar low-light image quality too (as you can shoot at lower ISOs).

But its not just the lens's speed that's remarkable - its image quality is just as impressive. Sharp enough to replace a bag of primes, it easily earned a Gold Award in our review. Indeed our main reservation was that Canon's SLRs can struggle to focus it accurately enough to make the most out of its sharpness at large apertures, unless you shoot in live view. We've had better luck on Nikon SLRs though. Some users might find its 28-50mm equivalent zoom range to be somewhat limiting, too.

Key specifications

  • 27-53mm equivalent range
  • 72mm filter thread
  • Ring-type ultrasonic focus motor
  • 0.28m minimum focus distance
  • For APS-C /DX cameras only
  • Canon, Nikon, Pentax, Sony Alpha, Sigma mounts 

The 18-35mm F1.8 is a DC lens, which means it will work on APS-C / DX format SLRs, but not full frame (where it will give strong vignetting). Sigma says it will eventually be made in mounts to fit all current SLRs: Canon EF, Nikon F, Sigma SA, Pentax K, and Sony Alpha, but at the time of writing the latter two aren't yet on sale. Note though that Pentax's oldest SLRs don't have the electrical pins required to drive the in-lens autofocus motor.

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