The 100-400mm focal range is much sought after by all nature and wildlife lovers. All the major manufacturers have such a lens in their range. With us this month is Sigma’s 100-400mm f/5-6.3 DG OS HSM Contemporary. In recent times, every Sigma lens tested by SP has been special. Will the 100-400 repeat the success? Design & Build Quality The Sigma 100-400mm f/5-6.3 DG … [Read more...]