Tokina AT-X 107 DX AF Fish-Eye 10-17 mm f/3.5-4.5 review - Vignetting

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Tokina AT-X 107 DX AF Fish-Eye 10-17 mm f/3.5-4.5

30 September 2007

Arkadiusz Olech

8. Vignetting

The Tokina’s extreme characteristics once again caused us a few troubles. It is hard to find a big, evenly lit surface, which could be photographed with a field of view lens as big as 180%. We managed to do it although because of the lens’s closeness, which was practically touching the photographed surface, the results are saddled with a large rate of error and should be treated as approximate. Therefore for a 10 mm and a maximum aperture, the light falloff in corners reaches 20%, decreases to 15% when stopping down to f/4.0 and down again to 10% after stopping down to f/5.6.

Tokina AT-X 107 DX AF Fish-Eye 10-17 mm f/3.5-4.5 - Vignetting

The results for greater focal lengths are much more precise. For 14 mm and a diaphragm of f/4.0 the light falloff in the corners reaches 19% (-0.61 EV), after using the aperture of f/5.6 it drops to 12%. The problem fades away for aperture of f/8 and reaching 7%.

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The best situation is for the 17 mm focal length, where even with a maximum aperture of f/4.5, the vignetting does not disturb as much and reaches 15% (-0.46 of aperture value). When we stop down the lens to f/5.6 the vignetting slightly drops but only to 13% but for f/8 it is almost unnoticed and reaches only 5%.

We should applaud the Tokina in this category. Remembering other wide-angle non-distortion zooms and their vignetting behavior, in which the light falloff in the corners could reach up to 30-40%, we were seriously concerned about the even more extreme parameters of the Tokina. Our doubts and fears were greatly exaggerated because the lens did very well in this category.