Telephoto zooms with a range of around 80-400mm or 100-400mm tend to be quite large and heavy – Canon and Nikon’s current offerings for their DSLR cameras weigh in at 1,640g and 1,570g respectively, and they’re both pricey to boot.
In 2017 Sigma launched its ‘light bazooka’ 100-400mm, which is only about two thirds the weight of those lenses, and less than half the price. It was very well received, and Sigma has now brought out a similar lens for mirrorless cameras, available in Sony E and Leica L mount options. Tipping the scales at 1,140g (Sony) or 1,135g (L-mount), it keeps the weight off but boasts a redesigned optical path and a new autofocus system.