Sigma’s 50mm f/2.8 EX DG Macro is a third-party lens available in five different fits – Canon, Nikon, Sigma, Sony and Pentax.
The construction of the Sigma 50mm f/2.8 EX DG Macro features 10 glass elements in 9 groups and when coupled to a D-SLR with a 1.5x crop factor, it has a film-equivalent focal length of 75mm.
Like the majority of Sigma’s lenses in the EX range it comes in a mottled matt black finish, sports a simple, neat design and the barrel features clear focus distance markings. There’s a raised MF/AF switch on the side of the lens and just in front of this there’s a Full/Limit switch used to limit the reproduction ratio to 1:3 to speed up AF when it’s not being used for macro work. The build of the lens is up to scratch with a metal lens mount and reasonably sized focus ring and although the latter isn’t as well weighted or refined as some of its closest rivals, it does operate smoothly through the range when it’s used manually.
Without a Sigma HSM motor it’s not surprising that AF operation isn’t wholly silent, so expect a bit of whir. And also note that the front part of the barrel extends by 1.5in when focused fully at the 1:1 reproduction ratio.
- Street price: £150 (Secondhand price as of July 2016)
- Dimensions: 71.4x66.5mm
- Weight: 320g
- Visit: www.sigma-imaging-uk.com
This review was first published in the February 2011 issue of Digital Photo - download back issues here.