Zeiss Milvus 21mm f/2.8

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Prime lens

A prime lens by Zeiss for Full frame cameras, 21mm f/2.8.

What it frames like

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

How wide 21mm sees on each sensor it covers.

f/2.8 wide open, to scale against f/1.4.

On full frame (Canon EF, Nikon F): as marked, 21mm.
On APS-C (Nikon F): like 32mm on full frame; f/2.8 gives about the depth of field of f/4.2 there.
On APS-C (Canon) (Canon EF): like 34mm on full frame; f/2.8 gives about the depth of field of f/4.5 there.