Tamron 24mm F/2.8 Di III OSD F051

Tamron's 24mm F/2.8 Di III OSD is a small, light wide-angle prime for Sony E full-frame cameras. The single focal length keeps the optical design simple. It suits travel, street, interior and landscape work where you want to move quickly and carry little. One focal length also means you frame by moving, not by zooming.

Tamron introduced this lens in 2019, and it remains in production. The main trade-off is the modest f/2.8 maximum aperture. In return, the lens stays small enough to carry anywhere. Close focusing also lets it double as a detail lens without changing focal length.

The lens weighs 7.6 oz (215 g) and measures 2.87 in (73 mm) across by 2.52 in (64 mm) long. It is short and light enough to leave on the camera all day. A screw-in filter attaches directly to the 67mm front thread, so any filter you buy must match that size.

At 24mm on a full-frame sensor, this prime takes in a wide view. It fits whole rooms, building facades and street corners from a normal working distance. In cramped interiors, you can keep both the subject and its setting in frame. Landscapes gain the same advantage, because one frame takes in a broad scene.

The f/2.8 maximum aperture is modest for a prime, yet it admits useful light. Dim interiors and evening streets stay workable without forcing ISO very high. Stopped down a little, depth of field runs deep across the wide view.

Subject separation at 24mm and f/2.8 is gentle rather than dramatic. Distant backgrounds stay recognisable behind your subject, which favours environmental portraits and reportage. The seven-blade diaphragm shapes out-of-focus highlights.

Close focusing suits detail work. The lens focuses as close as 0.4 ft (12 cm), so you can move right up to a small subject. Its 0.5x maximum magnification suits food, flowers and found objects. At this focal length, a close subject still shows some of its setting. At these distances, depth of field turns thin, and backgrounds blur softly.

This lens has no built-in image stabilisation. Wide framing shows camera shake less than a long lens would, so many handheld shots still succeed. The gap matters most for stationary subjects in fading light. There, a monopod or tripod does the steadying work. Handheld video also shows small movements less at 24mm.

The body is weather-sealed, which helps keep dust and moisture away from the interior during outdoor shoots. A fluorine coating on the front glass helps water and oil bead off, so rain, spray and fingerprints wipe away more easily. The coating sits on the exposed surface, the one most likely to collect marks.

Ten elements in nine groups include aspherical surfaces and low-dispersion glass. The aspherical surfaces help correct distortion, where straight edges appear curved. That matters when you photograph buildings and interiors. The low-dispersion glass helps reduce chromatic aberration, which shows as coloured fringes along high-contrast edges such as window frames against bright sky.