Sigma 15mm f/1.4 DC Contemporary

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Prime lens

A prime lens by Sigma for APS-C cameras, 15mm f/1.4. A fast wide prime for APS-C, about 22.5mm equivalent.

What it frames like

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

How wide 15mm sees on each sensor it covers.

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

On APS-C (Sony E, Fujifilm X): like 22mm on full frame; f/1.4 gives about the depth of field of f/2.1 there.
On APS-C (Canon) (Canon RF): like 24mm on full frame; f/1.4 gives about the depth of field of f/2.2 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.