Sigma 18-50mm f/2.8 DC DN Contemporary

Zoom lens

A zoom lens by Sigma for APS-C cameras, 18-50mm f/2.8. A tiny constant f/2.8 standard zoom: the best upgrade from a kit lens on APS-C.

Maker	Sigma
Focal length	18-50mm (zoom)
Maximum aperture	f/2.8
Made for	APS-C sensors
Mounts	Sony E, Fujifilm X, L-Mount, Canon RF
Stabilised	no
Autofocus	yes

What it frames like

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

How wide 18mm 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, L-Mount): like 27-75mm on full frame; f/2.8 gives about the depth of field of f/4.2 there.
On APS-C (Canon) (Canon RF): like 29-80mm 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, L-Mount, Sony E: it works with the camera in a APS-C crop mode, at fewer megapixels.