£349/$399
Sigma still markets a capable 17-50mm f/2.8 lens, originally launched back in 2010, but we prefer this newer offering.It has a bigger zoom range packed into a more compact, lightweight build. Announced in 2012, this was actually the first ‘Contemporary’ class lens in Sigma’s Global Vision line-up. As such, it aims to keep size and weight to a minimum without compromising image quality.