Combining medium-format coverage with a constant T3.5 aperture and a versatile 25-71mm equivalent range, this lens stands out for its internal zoom, focus, and iris motors with 0.8 MOD gears for seamless cine integration. Optical image stabilization and a 13-blade iris ensure smooth handheld footage and rounded bokeh in a fully weather-sealed build. This is best for landscape cinematographers and documentary crews needing a single, stabilized parfocal zoom for large-format sensor rigs.