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February 15, 2011
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Sigma is advising Sony users that its lenses are not compatible with the latest Alpha SLT-A55 and SLT-A33 'translucent mirror' cameras and it will fix them for free where possible. Specifically, the aperture may not operate correctly, giving an error message on the camera. The company says it will be offering to modify existing lenses free of charge, however this may not be possible for some lenses 'discontinued several years ago'. It advises owners affected to contact their nearest Sigma Service Station.
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DPREVIEW: www.dpreview.com/news/1009/100…
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:iconmaratenn:
maratenn Feb 16, 2011  Hobbyist Photographer
I also heard some older Sigma lenses from before 2001 have compability porblems with normal Sony's, is that true?
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:iconyowyo:
YOWYO Feb 16, 2011  Hobbyist Photographer
HI! :D
I be sincere, i don't heard any think about that, i believe they have some little problems, the system of the Sony is too young, and different of the others... but I also believe that Sigma did recall they lenses, as they now is doing with the lenses of users of the Sony SLT-A55 and A33... :D

Thanks for the contact!!!

Regards :iconyowyo: :peace:
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:iconmaratenn:
maratenn Feb 17, 2011  Hobbyist Photographer
[link]

Found it there seems to be with more older 28-105's
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:iconyowyo:
YOWYO Feb 17, 2011  Hobbyist Photographer
The problem shown in the link you post here is about miscalculations... of course it's a old series Sigma lens, but the problem only start when using Auto flash, maybe it's the only problem related for the older's series... For this new problem, the related is the miss control of the aperture, during the shooting, some click the lens can't calculate correctly the amount of aperture selected on the camera, it's a problem on main board of the lens, but the new lenses of 2011 comes without this problem, Sigma resolve this before come out the factory. :D

:peace:
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