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Rechip lens

Stewart Epstein , Feb 17, 2010; 12:50 p.m.

Hi,
I recently inherited an old Sigma 21-35mm metal barrel zoom for eos. Does anyone know if there is a service that rechips these old lenses. I know, of course, that there are better lenses, in fact, I own and use a 17-40L, but this was my Mom's favorite and I'd like to be able to use it for purely sentimental reasons. Any advice would be appreciated.
Best,
Stew

Responses


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Alan Bryant , Feb 17, 2010; 01:07 p.m.

Have you asked Sigma if they can do it? If they can't, you might ask around at experienced repair shops, maybe KEH. However, if Sigma can't provide the chips, I don't think it can be done.

I assume you've tried the lens and it didn't work?

JDM von Weinberg , Feb 17, 2010; 01:45 p.m.

Sigma in Britain, at least, did rechip some old lenses; but I'm not sure that they still do. I know that there were some, especially older ones, that they did not offer the service for.

Still, it never hurts to ask. Somewhere there might still be a bucket with a pile of chips in it :)

An alternative might be to buy an older EOS body on which the lens will still work. Most of the older EOS film cameras are fairly cheap if you stay away from the 3 or the 1 series. I haven't yet looked prices for early digital (afraid to, no room left in the cabinet....).

Bob Atkins , Feb 17, 2010; 02:00 p.m.

I seriously doubt it. That's a pretty old lens.

If the aperture stops down OK, just use manual focus.

Puppy Face , Feb 17, 2010; 04:10 p.m.

I recently inherited an old Sigma 21-35mm metal barrel zoom for eos. Does anyone know if there is a service that rechips these old lenses. I know, of course, that there are better lenses, in fact, I own and use a 17-40L, but this was my Mom's favorite and I'd like to be able to use it for purely sentimental reasons.

It will never work on a modern EOS camera without updated ROM. And Sigma abandons old models very quickly. If you really only want to use it for sentimental reasons, buy a period correct camera like an EOS 5 or 1N and use it for a few nostalgic snaps.

Sean Sosik-Hamor , Feb 17, 2010; 04:10 p.m.

With a lot of old lenses "rechip" actually means "replace". Years ago when I contacted Quantaray to rechip an old 70-300 I was passed on to Sigma who actually makes the lenses.

Sigma was unable/unwilling to rechip that particular lens but gave me a form to fill out to upgrade to and cross-ship their latest 70-300 offering for a $70 USD fee. I forget what the new Sigma actually retailed for but it was a really good deal at the time.

That lens was sold long ago but, for a $70 USD beater, it served its purpose well.

Gerald Wallace , Feb 17, 2010; 04:59 p.m.

I asked Sigma if they would re-chip three of my Sigma lenses and their response was the lenses were too old(4-5 years) - there was nothing they could do to update the lenses. I don't know if this is a typical response from camera/lens manufactures but I'm hesitant to buy another Sigma lens. (Although, I thinking about the 24-70 HSM)?

Puppy Face , Feb 17, 2010; 07:27 p.m.

I think Sigma is the only lens maker whom reverse engineers the operating code (instead of licensing) and hence rechipping is need when a new EOS camera is released. I used to own 6 Sigmas from 24mm to 400, all bought new from the mid to late 90s. All were obsolete and unsupported by 2000. I haven't bought any Sigmas since...

Stewart Epstein , Feb 18, 2010; 12:13 a.m.

Thanks for all of your responses. I called sigma USA and they won't/can't do it. It does'nt work at all with my 350d but seems to operate ok on my friend's Canon 5D, go figure...
Ah well, I guess I'll have a lens for full frame should I win the lottery and be able to upgrade. :)

Steven F , Feb 18, 2010; 09:52 p.m.

I think Sigma is the only lens maker whom reverse engineers the operating code (instead of licensing) hence rechipping is need when a new EOS camera is released

Tamron and Tikina also reverse engineer the operating code. Canon doesn't license it to anyone. Sigmas problems occured around the release of the 10D. Canon made a small change that cause problems with Sigma lenses. Sigma hasn't had any problems since the release of the 30D.

It does'nt work at all with my 350d but seems to operate ok on my friend's Canon 5D, go figure...

I tried an older lens on my 5D and it worked find with the aperture wide open. However as soon as I stopped down it wouldn't work.


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