The Lumix S 100-500mm F5-7.1 is Panasonic’s longest zoom yet for its L-mount full-frame mirrorless system. It’s small and lightweight given its 500mm range, being similar in size to conventional 100-400mm zooms. It should appeal to photographers shooting distant subjects, including sports, wildlife, airshows, motorsports, or other kinds of action photography.
However, while this may be Panasonic’s longest full-frame zoom, it’s not the only option for L-mount users. Instead, it’s up against two fine alternatives from Sigma. Firstly, the 100-400mm F5-6.3 DG DN OS is about the same size, but offers a shorter zoom. Meanwhile the 150-600mm F5-6.3 DG DN OS provides even longer reach, but is much larger and heavier in return.
At £1,799, this 100-500mm lens costs rather more than either of these rivals (£899 and £1,199, respectively).…