Tamron SP 35 mm f/1.8 Di VC USD
5. Chromatic and spherical aberration
Chromatic aberration
The photos shown below are the proof that the tested lens doesn’t have any serious problems with the lateral chromatic aberration. Still if you want to be honest it’s worth noticing that the hue of out-of-focus images seemed a bit more pronounced when the lens was attached to the Nikon D7000.
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The correction of the lateral chromatic aberration, however, might be described only in superlatives. Near the maximum relative aperture it is practically imperceptible; then it increases a bit on stopping down but still its level remains low.
Once again the 35 mm model fares better than its brother with the longer focal length. The Canon 2/35 IS had very similar results in this category but its maximum level was a bit higher. The Nikkor AF-S 1.8/35G fared worse practically at all aperture value for a change. Once again the Sigma A 1.4/35 is the most serious rival of the Tamron – it had results of 0.03-0.06% which were only slightly depending on the aperture value.
| Nikon D3x, RAW, f/1.8 | Nikon D3x, RAW, f/8.0 |
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Spherical aberration
First photos, opening this chapter, show clearly that the lens has no problem whatsoever with the focus shift effect. Circles of light we got in front of and behind the focal point are perhaps not completely identical but there is nothing truly worrying in them either. What’s more, even by f/1.8 the images provided by the Tamron are properly contrasted, without mist so characteristic for optical constructions which correct spherical aberration badly. These premises make us say that the Tamron 1.8/35 doesn’t have any significant spherical aberration problems.
| Nikon D3x, f/1.8, in front of | Nikon D3x, f/1.8, behind |
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