Tamron 11-20mm f/2.8 Di III-A RXD

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Zoom lens

A zoom lens by Tamron for APS-C cameras, 11-20mm f/2.8.

What it frames like

Its full-frame-equivalent focal length on the sensor it was made for.

How wide 11mm sees at its wide end on each sensor it covers.

f/2.8 wide open, to scale against f/1.4.

On APS-C (Sony E, Fujifilm X): like 16-30mm on full frame; f/2.8 gives about the depth of field of f/4.2 there.
On APS-C (Canon) (Canon RF): like 18-32mm on full frame; f/2.8 gives about the depth of field of f/4.5 there.
On the larger-sensor bodies of Canon RF, Sony E: it works with the camera in a APS-C crop mode, at fewer megapixels.