Tamron 11-20mm F/2.8 Di III-A RXD B060

This Tamron ultra-wide zoom is designed for APS-C mirrorless cameras. The Sony E version arrived in 2021; Fujifilm X and Canon RF versions followed. Choose the version made for your camera. The 11–20mm range suits interiors, architecture and wide landscapes. Check available space when using it for handheld video.

The constant f/2.8 aperture is the headline specification. The same widest opening stays available at 11mm and at 20mm, which helps indoors and after dark. Wide-angle night sky work is a natural fit for that opening.

There is no built-in stabilisation. A camera with body stabilisation can help with shake, and firm support is useful for long exposures. The short zoom range covers wide views, so distant details may need another lens.

The Sony E version weighs 11.8 oz (335 g) and measures 2.87 in (73 mm) across and 3.39 in (86.2 mm) long. Other mount versions differ in dimensions or weight. Allow space for the hood and caps.

A screw-in filter attaches directly to the lens and must match the 67mm thread.

On APS-C the 11mm end gives an ultra-wide view for tight interiors, single-room property shots and broad building fronts. The 20mm end is a mild wide angle, useful when 11mm takes in more than the scene needs.

The f/2.8 maximum aperture stays constant through the zoom. In a dim church or a lamp-lit room, that wide opening lets in more light than a smaller one would. That helps you keep working without flash. It also suits night sky work, where the wide opening at 11mm helps record faint stars in a dark sky.

At 11mm, closest focus is 0.5 ft (15 cm) and maximum magnification is 0.25x. The minimum distance is longer at the telephoto end. A foreground flower or small object can become part of a wider scene. Leave space for light ahead of the lens, and check that the camera does not shade the subject.

Depth of field depends on aperture, focus distance and focal length. A close subject can have a soft background at f/2.8. Stop down when more depth is needed, then check near and distant details. Moving the camera changes perspective as well as framing.

Weather sealing gives resistance to dust and moisture. That suits coastal landscapes and dusty trails.

There is no image stabilisation in the lens. A camera with body stabilisation can help with shake. Use firm support for long exposures, and select shutter speed for subject movement.

A fluorine coating on the front element helps water and oil wipe away more easily. After fingerprints or dust, that makes routine cleaning simpler.

The shared optical formula includes two glass-moulded aspherical elements. Their shaped surfaces help correct distortion and spherical aberration. Distortion can make straight walls or doorframes appear curved. This is relevant when composing architecture and interiors.

Two LD and one XLD element help reduce chromatic aberration, the coloured fringes that can appear along high-contrast edges such as roofs against bright sky. These glass types describe methods of optical correction; their presence does not establish measured image quality.