Sigma 24-105mm f/4 DG OS HSM Art

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Zoom lens

A zoom lens by Sigma for Full frame cameras, 24-105mm f/4.

What it frames like

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

How wide 24mm sees at its wide end on each sensor it covers.

f/4 wide open, to scale against f/1.4.

On full frame (Canon EF, Nikon F): as marked, 24-105mm.
On APS-C (Nikon F): like 36-158mm on full frame; f/4 gives about the depth of field of f/6 there.
On APS-C (Canon) (Canon EF): like 38-168mm on full frame; f/4 gives about the depth of field of f/6.4 there.