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Old Aug 8, 2005, 8:04 AM   #1
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Can anyone please advise. I've just bought the Canon D 350. Before purchasing I called into my local camera shop and took in my Sigma 70-300 EOS lens to see if it was compatible. The guy tried it and assured me it was. I bought the camera off the net as it was much cheaper. However, when I tried the lens it won't work. The shutter freezes and I get an error message. One of the reasons I bought the Canon was to save having to buy a long lens.

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Old Aug 8, 2005, 8:08 AM   #2
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Which 70-300 is it? I have used the 70-300 APO Macro II and the APO DG lenses on my RebelXT and they both worked perfectly.
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Old Aug 8, 2005, 2:54 PM   #3
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Thanks, and sorry its a Sigma zoom AF 75-300. I can't see any other model number on it, but the guy in the shop was adamant that it would work. That's the main reason I upgraded for the long shots. I've been using a Canon EOS 5oo with the long lens and a digital camera for the closer stuff.
Thanks again.
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Old Aug 8, 2005, 2:56 PM   #4
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Did you buy it new? If so, I'd call Sigma...if not, take it to the shop with your camera and show him it doesn't work. Either exchange it or return it.
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Old Aug 9, 2005, 7:37 AM   #5
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Thanks. It wasn't new and the shop I bought it from is miles away. Its worked fine for 3 years on the old EOS 500. That's the trouble with buying online.

Thanks again
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Old Aug 9, 2005, 11:51 AM   #6
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Ya' got that right !! The Romans figured that out a couple thousand years ago
"Caveat Emptor" strikes again.
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Old Aug 9, 2005, 1:05 PM   #7
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Sigma in the past made about 5 different models of the 75-300.

It is quite possible the lens needs to be re-chipped, contact your local Sigma repair.
If the lens is still supported there is a chance they will even re-chip it for free.

Peter.

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Old Aug 9, 2005, 1:27 PM   #8
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I had the same problem with an older Quantaray 70-300 that I had for my film camera. I ended up buying a new Sigma 70-300 DG lens and it works fine. I would have tried to get it rechiped or something but there isonly one company in Oklahoma City to take stuff to (Epersons) and they arent much help unless your a professional.
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Old Aug 10, 2005, 7:45 AM   #9
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Thanks a lot
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Old Aug 10, 2005, 8:57 AM   #10
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This has been asked about 5 threads ago ????

Your lens doesnt seem to be on my list, still you never know with Sigma, they are a real pain in the ..........
Sometimes. Unfortunately certain third-party lenses not built by Canon, notably many older Sigma lenses, will not work correctly on some newer EOS camera bodies like the Elan 7/EOS 30/33 and the digital EOS 10D. The most common symptom is the mirror flipping up and then the camera freezing when you try to take a photo. You then have to switch the camera off to unlock it. The only solution to this problem is to see if Sigma will upgrade the lens for you. If they still have inventory of the control chip they apparently will happily do so for free.

The only third-party maker of EF-compatible lenses with no major compatibility problems so far is Tamron. Some people have suggested that this is because Tamron have licensed official lens protocol data from Canon, but Canon USA's Chuck Westfall has stated repeatedly in public fora that Canon have never licensed their lens mount protocol to any other manufacturer. So Tamron have either been very lucky or very clever in their reverse-engineering of the Canon lens system. They seem to be a reasonably safe bet right now for compatibility, given their track record, but it's impossible to predict future developments in this regard.

The following Sigma lenses require upgrading for compatibility with newer EOS cameras, according to Sigma:

24-70mm 3.5-5.6 aspherical UC
28-80mm 3.5-5.6 mini zoom macro aspherical
28-80mm 3.5-5.6 mini zoom macro aspherical HF
28-80mm 3.5-5.6 mini zoom macro II aspherical
28-105mm 2.8-4 aspherical
28-105mm 3.8-5.6 UC-III aspherical IF
28-135mm 3.8-5.6 aspherical IF macro
28-200mm 3.5-5.6 DL aspherical IF hyperzoom macro
28-300mm 3.5-6.3 DL aspherical IF hyperzoom
70-210mm 4-5.6 UC-II
70-300mm 4-5.6 APO macro super
70-300mm 4-5.6 DL macro super
100-300mm 4.5-6.7 DL
135-400mm 4.5-5.6 APO aspherical RF
170-500mm 5-6.3 APO aspherical RF
8mm 4 EX circular fisheye
15mm 2.8 EX diagonal fisheye
24mm 2.8
28mm 1.8 II aspherical
50mm 2.8 EX macro
105mm 2.8 EX macro
300mm 4 APO tele macro
400mm 5.6 APO tele macro
500mm 4.5 APO
500mm 7.2 APO
800mm 5.6 APO
28-70mm 2.8-4 UC
28-105mm 4-5.6 UC
28-105mm 4-5.6 UC-II
70-210mm 3.5-4.5 APO macro
28-200mm 3.8-5.6 aspherical UC



Buy Canon, its anL of a better Lens :blah:

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