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The following opinions have been automatically translated with Google Translate.
Pros:robust, good quality if prepunched (f 8-11), the overall yield acceptable to f2.8.
Cons:distortion "barrel" very obvious focal length 18, is corrected only in PP, there is the possibility to correct the focus manually while in AF, (the ring is locked), AF slow (non-USM).
Opinion:I have this light for 6 years and use it regularly, is solid and robust as Sigma has accustomed us. Good overall performance for sharpness at f2.8 at all focal lengths, even the good macro. Unfortunately, at least my copy, has back focus problems with my 30D, Canon unsolved problem from assistance that does not even come into the lab Canon lenses do not, I'll keep that. Aberration decided to "barrel" to the focal length 18, which decreases as you go up the focal impractical for photos of architecture and interiors, autofocus is not fast and noisy, due to the fact that it is not USM.rnSostanzialmente good alternative to the kit plasticone , at least it was in production until, well as a handyman and reportage, good for portraiture.
user24002
sent on April 08, 2013
Pros:brightness and sharpness
Cons:front lens against dust too exposed to the impact and scratches
Opinion:goal is a relatively inexpensive but quality ', the images are very sharp at all focal lengths f 2.8 even while there is some reflection in the light, partially solved with the lens hood supplied with the lens front is a bit exposed to shock and scratches therefore recommend a filter uv permanently mounted Great price performance
The following opinions have been automatically translated with Google Translate.
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