One of most frequently asked questions in photography must be “which affordable tele lens should I buy”. If you are shooting Canon gear, the options often mentioned, are the Canon EF 100-400mm f/4.5-5.6 L IS USM (Canon 100-400), Canon EF 400mm f/5.6 USM L (Canon 400) and Sigma 50-500mm f/4-6.3 EX DG HSM (Bigma). So, when I was in the market for a tele lens for birding, I had to make the same choice and at the end, I got all three lenses because I couldn’t choose and kept wondering which one was best.
Having all three lenses however was an excellent opportunety to compare them to each-other to see which lens suited best my type of photography.
So I set up a small, simpel test to compare these 3 lenses. If you’re interested in the outcome, please read my report at http://www.severi.be/photography/reviews/review01.htm
