Tamron 100-400mm f/4.5-6.3 Di VC USD

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Zoom lens

A zoom lens by Tamron for Full frame cameras, 100-400mm f/4.5-6.3.

Maker	Tamron
Focal length	100-400mm (zoom)
Maximum aperture	f/4.5-6.3 (it gets darker as you zoom in)
Made for	Full frame sensors
Mounts	Canon EF, Nikon F
Stabilised	yes
Autofocus	yes

What it frames like

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

How wide 100mm sees at its wide end on each sensor it covers.

f/4.5 wide open, to scale against f/1.4.

On full frame (Canon EF, Nikon F): as marked, 100-400mm.
On APS-C (Nikon F): like 150-600mm on full frame; f/4.5-6.3 gives about the depth of field of f/6.8-9.4 there.
On APS-C (Canon) (Canon EF): like 160-640mm on full frame; f/4.5-6.3 gives about the depth of field of f/7.2-10.1 there.