Sigma 28-45mm F1.8 DG DN Art

This zoom covers 28–45mm at a constant F1.8. That bright maximum suits reportage, weddings and events, where light is often poor and flash unwelcome. Zooming also lets you reframe without moving, which helps when working around guests. The wide end frames rooms and small groups. The 45mm end gives a quieter perspective for portraits and details.

Sigma builds it for full frame cameras in Sony E and Leica L mounts, so choose the version matching your system. Released in 2024, it remains in production. The trade-off is size and weight: the Sony E version is heavy for such a short zoom range.

The Sony E version weighs 2 lb 1.5 oz (950 g) and runs 6.04 in (153.4 mm) long. The body is 3.46 in (87.8 mm) wide. That makes it a large lens on a mirrorless camera. Leica L figures are not available here. The front takes 82mm screw-in filters, so choose filters in that size.

The 28–45mm span runs from a wide view to a short standard length. At 28mm you can photograph interiors, architecture and groups in tight rooms without stepping back. The 45mm end suits individual portraits and still-life details, giving a more natural perspective. Between those ends, the range covers most walk-around framing for street and documentary work.

The F1.8 maximum stays available at every focal length. You can keep photographing through an evening reception or a dim gallery without raising ISO as far as a slower zoom would force. The same aperture also separates a speaker or sitter from a busy background. The diaphragm uses eleven aperture blades.

Closest focusing distance is 1 ft (30 cm), so you can work close to a subject at a table or desk. Maximum magnification reaches 0.25x, which suits tabletop subjects such as food, flowers or small products.

The optics specification score for this lens is 88/100.

There is no optical image stabilization. For slower shutter speeds you need a steady hold, a tripod or a monopod. Support keeps the camera still for static subjects, though it will not stop a dancer or a running child from blurring.

The lens has weather sealing against dust and moisture, a useful safeguard for outdoor work. The Sony E version also carries a fluorine coating. This coating detail applies to the Sony E version; other mount versions may differ, so check the version made for your system.

There is no zoom lock to secure the zoom position during transport or storage. The features score for this lens is 52/100.

Three aspherical elements help correct distortion and spherical aberration, which can bend straight lines such as door frames in interior shots. Five low-dispersion elements help reduce chromatic aberration, where colours focus differently and fringe high-contrast edges like windows against sky. Internal focusing moves the optics inside the barrel, so the lens does not extend while you focus.