Weighing just 298g, this full-frame 100mm macro is the lightest in its class, combining a bright f/2.8 aperture with a dual linear/stepping motor AF system for fast, silent focusing down to 1:1 magnification. Its dust- and splash-resistant build, paired with a sophisticated 13-element optical design featuring three aspherical and three ED elements, ensures sharp, aberration-free images even in challenging conditions. This lens is best for field macro photographers who need a highly portable, weather-sealed setup for handheld 1:1 close-ups without a tripod.