Sigma 8-16 mm f/4.5-5.6 DC HSM
9. Ghosting and flares
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The Sigma’s 8-16 mm front element is big and very convex and the build-in hood which surrounds it – relatively short (perhaps it couldn’t have been longer because it would limit the field of view too much). We expected the Sigma could have some problems with work against bright light. The problems duly occurred. When a source of bright light is put in one corner of the frame, we see the series of small artifacts ended by the biggest colourful flare, positioned diagonally through the image. On significant stopping down this effect becomes even more pronounced. Near the maximum relative aperture these artifacts are a lot less intense but the overall contrast of the picture decreases for a change. It’s worth adding here that the intensity and the number of artifacts decrease with the lengthening of the focal length.
To sum up we see no sensational results here. One must remember, though, that with such angles of view and such dimensions of the front element which is not very well hooded, the fight with flares is very difficult. The Sigma shouldn’t be reprimanded for its performance here very harshly.
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