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Lens review

Tamron SP 24-70 mm f/2.8 VC USD G2

18 December 2018
Maciej Lata││o

10. Autofocus

Joined with the Canon 5D Mark III the autofocus of the tested Tamron is noiseless and quick. Running through the whole distance scale and setting the focus takes about 0.5 of a second. It seems that the lens is a tad quicker when going from the minimum distance to infinity than the other way round but the difference is not big, amounting to about 0.1 of a second. These results don’t change when you attach the lens to the older Canon 50D and are similar to the performance of the predecessor. They are also completely praiseworthy.

We don’t have any reasons to complain about the accuracy of the focusing mechanism. Outside, in good lighting conditions, we didn’t experience any problems. In the studio the number of misses didn’t exceed 2–3%.

When it comes to front or back focus tendency this time we have something different to say. The Tamron 24-70 mm G2 didn’t cooperate seamlessly with the EOS 50D because at 50 mm it had distinct back-focus which changed into front-focus after passing to 70 mm.

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The situation was a tad better with the lens attached to the 5D Mk III where, at 50 mm, we noticed a very slight front-focus which practically disappeared after passing to 70 mm. The effect was so imperceptible that both focal lengths could be improved by just one microcalibration adjustment on the camera menu level.

Canoná50D, 50ámm, f/2.8
Tamron SP 24-70 mm f/2.8 VC USD G2 - Autofocus
Canoná50D, 70ámm, f/2.8
Tamron SP 24-70 mm f/2.8 VC USD G2 - Autofocus
Canon 5DáMkáIII, 50ámm, f/2.8
Tamron SP 24-70 mm f/2.8 VC USD G2 - Autofocus
Canon 5DáMkáIII, 70ámm, f/2.8
Tamron SP 24-70 mm f/2.8 VC USD G2 - Autofocus