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.
Leave it to Sigma, the self-confessed "guinea pig of the lens industry", to deliver the 28-45mm f/1.8, which sets new standards for what we can expect of zoom lenses. Previously, the family of f/2.8 professional zooms (15-35mm, 24-70mm and 70-200mm) were considered the "holy Trinity" because of their speed and coverage.
While the new lens obviously covers a much shorter range, if those are the Trinity lenses then dare I say this 24-45mm f/1.8 promises to be the New Testament of what we can expect of performance optics.
In addition to the constant f/1.8 throughout the range, the lens also boasts a constant size throughout the range – thanks to an internal zoom mechanism. So, while this 151.4mm / 960g lens isn't exactly small, it's incredibly compact for what it accomplishes – and, crucially, the balance remains fixed, making it perfect for gimbal use.
"The Sigma 28-45mm f/1.8 DG DN Art delivers sharpness and clarity comparable to that of a prime lens throughout its entire zoom range," claims the manufacturer, promising that it "rivals prime lenses for clarity and definition."
This is thanks to an elaborate optical formula consisting of 18 elements (including 5 super-low dispersion and 3 aspherical) in 15 groups, with Nano Porous Coating and Super Multi-Layer Coating meaning that flare and ghosting are "largely eliminated".
In addition to its fixed size being a boon for videography, the lens also suppresses focus breathing and the dedicated aperture ring can be – making it a powerful tool for filmmaking.
The Sigma 28-45mm f/1.8 DG DN Art goes on sale June 20, for L-Mount and Sony E mount, priced £1,349 / £1,299 / AU$1,599.
You might be interested in the best Sony lenses for E mount bodies along with the best L-Mount lenses for Leica, Panasonic and Sigma cameras.
