Standard zoom

Standard zooms cover the most popular focal length ranges from wide-angle to short telephoto and therefore lessen the need to change lenses while shooting – worth remembering if you’re out and about on a day of sunshine and showers. The Sigma 24-70mm f/2.8 DG OS HSM (£1,100) is notable for a constant f/2.8 aperture throughout its focal range.

www.sigma-imaging-uk.com