Sigma 40mm f/1.4 DG HSM Art

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Prime lens

A prime lens by Sigma for Full frame cameras, 40mm f/1.4.

Maker	Sigma
Focal length	40mm (prime)
Maximum aperture	f/1.4
Made for	Full frame sensors
Mounts	Canon EF, Nikon F, Sony E, L-Mount
Stabilised	no
Autofocus	yes

What it frames like

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

How wide 40mm sees on each sensor it covers.

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

On full frame (Canon EF, Nikon F, Sony E, L-Mount): as marked, 40mm.
On APS-C (Nikon F, Sony E, L-Mount): like 60mm on full frame; f/1.4 gives about the depth of field of f/2.1 there.
On APS-C (Canon) (Canon EF): like 64mm on full frame; f/1.4 gives about the depth of field of f/2.2 there.