Sigma EO-ETTL II Flashgun Problem with Canon 50D

Mark Goldstein | Accessories | October 29, 2008 | 2 Comments |

Sigma EF-530 DG SUPER EO-ETTL II Sigma’s range of EO-ETTL II flashguns do not work with the Canon EOS 50D DSLR camera. The Autozoom function does not work properly, and exposure is not set correctly. Sigma are supplying a free-upgrade service to their customers to solve the problem. All new products shipped after today already include the updated firmware.

Sigma Press Release

Notice to customers using Sigma’s EO-ETTL II type flashguns

2008.10.29 - Sigma’s EF-530 DG SUPER EO-ETTL II, EF-530 DG ST EO-ETTL II, EM-140 DG EO-ETTL II, EF-500 DG SUPER EO-ETTL II and EF-500 DG ST EO-ETTL II do not operate properly with Canon EOS 50D D-SLR camera. To overcome this, we will start supplying a free-upgrade service to our customers today.

Please notice that this problem occurs with the EOS 50D D-SLR camera only.

We deeply apologize for any inconvenience this may have caused to our customers.

Upgrade will be required to overcome the following problems:
1. The Autozoom function does not work properly.
2. Exposure is not correct.

List of flashguns requiring update
ELECTRONIC FLASH EF-530 DG SUPER EO-ETTL II Serial Number lower than 1047200
ELECTRONIC FLASH EF-530 DG ST EO-ETTL II Serial Number lower than 1045700
ELECTRONIC FLASH MACRO EM-140 DG EO-ETTL II Serial Number lower than 2054400
ELECTRONIC FLASH EF-500 DG SUPER EO-ETTL II * This update service is only possible if the flashguns’ back panel shows EO-ETTL II marking.
ELECTRONIC FLASH EF-500 DG ST EO-ETTL II * This update service is only possible if the flashguns’ back panel shows EO-ETTL II marking.

* This upgrade service is not available if the flashgun does not support EO-ETTL-II. (They are marked only “EO-ETTL” or “EO” on the back of the body).

Products shipped after today already include this updated firmware.

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Your Comments

2 Comments so far | Post a comment

#1 Steve Filipiak

How do I find the serial number?

10:49 pm - Sunday, December 14, 2008

#2 Crazy Camera Guy

If you are a Canon 50D user you could be very disappointed when you recieve this flash and find out that it misbehaves on your camera. To fix it means sending it to sigma for upgrade. If you contact Sigma Customer service you'll speak with Tom who is without a doubt one of the rudest customer service reps I have ever spoken too, I then spoke with Mark Amir (Sigma General Manager) who said I had one of two options: #1) buy another flash directly from them and then send the one I purchased from adorama in for a refund. #2) send mine in for repair and they'd do the upgrade adn try to send it back out as soon as possible.

See one of several links to the Sigma Press Release Date 10-29-2008 (Yes 2008) and places like Adorama are still shipping product that is outside older and not fixed.

and Adorama Camera out of NY is still shipping non-upgraded flashes.

Save yourself the headache and hassle, just buy the Canon!!

10:13 pm - Thursday, July 2, 2009