Sigma Lens Problems With Sony A33 and A55

Sigma has issued a notice to customers concerning potential problems with aperture operation of Sigma lenses on the Sony A33 and A55 cameras.

See the full details in Sigma’s statement below.

Sigma’s lenses for Sony mount may have a potential aperture operation problem when used with the Sony α33 and α55 Interchangeable Lens digital cameras.

To overcome this issue, we will be offering, free of charge, a modification service to our customers who have purchased a Sony α33 and α55 and own Sigma lenses for Sony mount.
This phenomenon will only occur with Sony α33 and α55 cameras. Future production of Sigma lenses will be fully compatible with these cameras.

We deeply apologize for any inconvenience caused to our customers.


When shooting with a Sony α33 and α55 cameras, the aperture may not work properly and a “camera error” message will be displayed on the camera.

[Lenses requiring the modification]

All current Sigma’s lenses for Sony mount.

* For lenses discontinued several years ago, a modification may not be available. For further details, please contact your nearest authorized Sigma Service Station.

[Support for this issue]

We will be offering a modification service for our current range of lenses free of charge. Please contact your nearest authorized Sigma Service Station.




  1. Elliott Fingerhood says

    I was going to purchase the Sigma 18-125mm lens for my Sony A33 however I am now hesitant to buy this lens after hearing that there is a problem with the Sigma lenses.

    Please let me know what is your recommendation.