Sigma issues advisory notice for Sony A33 and A55

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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