Sigma 24mm F/2 DG DN | C

This Sigma 24mm f/2 prime serves full-frame mirrorless cameras in Leica L and Sony E mounts, so choose the version made for your system. It arrived in 2021 and remains in production.

A 24mm wide angle suits street photography, architecture, interiors and travel. It frames a broad scene without forcing you far back, which helps in narrow streets and small rooms. The f/2 maximum aperture adds low-light reach for evening work.

The trade-off is the fixed focal length. You reframe by moving, and distant subjects stay small. In return you get a compact, light lens that can stay on the camera all day.

The Leica L version weighs 12.9 oz (365 g); the Sony E figure may differ. The body measures 2.76 in (70 mm) across and 2.83 in (72 mm) long, so it suits compact mirrorless bodies. Screw-in filters must match the 62mm thread.

At 24mm the lens takes in a broad view. That helps where you cannot step back: tight interiors, narrow streets and crowded markets. Architecture and travel work benefit too, since one frame can hold a whole facade or street corner.

The f/2 maximum aperture gathers light quickly. You can hand-hold in dim restaurants and evening streets, and keep ISO lower than a smaller aperture would demand. Wide open, a near subject gains some separation from its background, which helps it stand out against a busy street.

A 24mm lens keeps generous depth of field even at f/2. Backgrounds remain recognisable rather than dissolving, which suits environmental portraits and reportage where context matters. Strong subject isolation belongs to longer lenses.

Focusing reaches 0.8 ft (24.5 cm) from the subject. That lets you move in on a still object, such as a plate of food or a bunch of flowers, and fill the frame. Nine aperture blades keep the opening round when stopped down, smoothing out-of-focus points of light from evening lamps and window glow.

The lens is weather sealed, so light rain and dust need not end a street session or travel day. That makes it easier to keep working through changeable weather on foot.

There is no built-in stabilisation. The wide 24mm view lets you hand-hold at slower shutter speeds than a telephoto allows. That helps in fading light, though very dim interiors still call for a higher ISO or steady support. If your camera body includes stabilisation, it may fill this gap.

The front element has no fluorine coating, so dust and fingerprints do not shed easily. Carry a cloth and clean the glass gently.

Aspherical elements help correct distortion, the fault that bends straight edges such as building lines. Low-dispersion glass helps reduce chromatic aberration, the coloured fringes that can appear along high-contrast edges like branches against a bright sky.

Focusing is internal, so the lens keeps its length while it focuses and nothing extends toward your subject. The element and group totals sit in the specification table.