
Sigma has just revealed a groundbreaking, world-first lens: the Sigma 28-45mm f/1.8 DG DN Art, which is the first full-frame zoom lens with a constant f/1.8 aperture, for E and L-Mount.
This is exactly the kind of optic that the mirrorless revolution promised us: with larger throats and reduced distance between lens and sensor, lenses that were previously impossible are now achievable.