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Sigma 105mm f/2.8 EX Macro upgrade chip

Recently, I had acquired a Digital Rebel. And my trusty Sigma 105mm f/2.8 EX Macro lens had some issues with it. So I sent the following e-mail to Sigma:

"Hi, I have had my Sigma 105mm f/2.8 EX Macro lens for years. It had worked fine on all of my Canon EOS cameras, Rebel, Elan IIe, D30, etc. However, I recently acquired a Digital Rebel and the lens works fine at f/2.8. At any other aperture, the camera shows an error and would not trigger the shutter. Could you tell me how to resolve this problem?"

Chieh Cheng
Mon Jan 17 13:34:34 PST 2005

Sigma responded the next day with the following e-mail:

"Thank you for your inquiry.
If your lens has a serial number starts with 1 or 2, it needs to be upgraded.
If you live in U.S., please send it to:

SIGMA CORP. OF AMERICA
ATTN: SERVICE DEPT.
15 FLEETWOOD COURT
RONKONKOMA, NY 11779
PHONE: 1-800-896-6858

If you live outside U.S., please click on "contact" then "worldwide" to locate our service station in your area.

We upgrade your lens(es) free of charge.
***Note: please send as soon as possible while we have upgrade chips available.

Please enclose:

* your mailing address
* your phone number(s)
* e-mail address (if available)
* description of problems
* type of camera"

I've sent in my lens last week. I'll keep you guys posted on the result.

Chieh Cheng
Mon Jan 17 13:37:06 PST 2005

Sigma's service is extremely quick!

I got back my lens today, a week and a half after I sent it in. The lens came back working just fine with my Digital Rebel now. Sigma even packed it in a lens carton and wrapped it in plastic.

The lens exterior was cleaned and the glasses are spotless. Not that I don't keep my lens elements clean in the first place, but one glance and it's obvious that Sigma cleaned them to a gleam. I wish I had sent back the lens hood, front and rear cap, too, for a good clean.

Chieh Cheng
Mon Jan 24 17:27:51 PST 2005

Saw your Sigma 105mm f2.8 EX problem in the forums

I live in UK, and a friend from USA bought over to me a Sigma 28-105mm f2.8 and the serial number starts with 1

I have the same problem, at f2.8 all ok,at any other aperture. the camera shows an err 99

I have the Canon 300D (in USA is call Digital Rebel).

I call Sigma UK, they told me to send it in with a receipt, if with out a receipt than will cost me 39 uk pound (72 US dollar), in your case, it was free of charge.

Al you might know, we in UK everything are expensive, including this new chip service ?

Sam Chan
Jun 17, 2005 12:19 PM

Hi Sam,

You'll want to send that in as soon as possible. The upgrade chips are in limited quantities. When they run out, you won't be able to upgrade your lens any longer.

Chieh Cheng
Jun 18, 2005 2:04 PM

Hi Chieh

I have two choices, either do it over here in UK, pay the 72 us dollar charges, all can be done (as far as I know, there are lots of chips here in UK)
or
I let my friend take the lens back to US (he is stringing with me in Wimbledon at this moment, still have two weeks to go !) by the time he is back in US will be the 5 / 6th July. Do you think will be too late ? or by any chance I can reserve one of this chip ''now'' and ask them to hold on to it until he is back ?

Sam Chan
Jun 18, 2005 11:53 PM

So will your friend bring the lens back to you after it's fixed or ship it back to you? Have you considered how much it would cost if he shipped it back to you?

Chieh Cheng
Mon, 20 Jun 2005 16:44:18 -0700

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