Tamron AF 18-270 mm f/3.5-6.3 Di II VC LD Asph. (IF) MACRO review - Distortion

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Tamron AF 18-270 mm f/3.5-6.3 Di II VC LD Asph. (IF) MACRO

23 June 2010

Arkadiusz Olech

6. Distortion

The distortion correction is not the strongest point of the tested Tamron but generally it is no mean feat for zoom lenses with so high zoom ratio so small wonder the Tamron copes badly here. At the shortest focal length it gives us already many reasons to complain – it has the highest result from all the lenses with focal lengths range starting with 18 mm and ending at 200 mm or more, tested by us so far. The result of –5.74% does the Tamron no credit at all.

As you see in the chart below, fortunately the Tamron fares a bit better at longer focal lengths but still it lags behind the Sigma, which is an example to be followed in this category.

	Tamron 18-270 VC	Nikkor 18-200 VR	Sigma 18-200 OS	Sony 18-200	Tamron 18-200
18 mm	-5.74%	-5.40%	-4.4%	-5.50%	-5.14%
50 mm	1.49%	1.59%	1.20%	2.00%	1.78%
100 mm	1.34%	1.46%	1.00%	1.55%	1.40%
200 mm	1.03%	1.21%	1.00%	1.33%	1.17%
270 mm	0.94%	-	-	-	-

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