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Best camera for the tamron sp af 28 75mm f 2 8 xr di ld aspherical if macro?

The Tamron 28-75mm f/2.8 is a full frame lens, so I'd pair it with a full frame body and let it cover its full range as marked. Three picks from its list:

If you already own an APS-C body such as the Canon EOS 80D, the lens still works, but it becomes a tighter, roughly 45-120mm equivalent. The focal length converter explains that shift in more detail.

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