Sigma 50-120mm f/2.8 DC OS Contemporary

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Zoom lens

A zoom lens by Sigma for APS-C cameras, 50-120mm f/2.8. A compact constant f/2.8 telephoto zoom for APS-C, about 75-180mm equivalent.

What it frames like

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

How wide 50mm 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 75-180mm on full frame; f/2.8 gives about the depth of field of f/4.2 there.
On APS-C (Canon) (Canon RF): like 80-192mm 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.