Tamron lenses won't work with rebel xti

Jon wrote in post #2334409
Dunno - it was early 2005 and she lives in Arkansas, so I don't know the details, just that she did have a problem, had to send it back, and it was only with the 20D, not the 10D. Maybe the distance-reporting as implemented in E-TTL 2? I know distance reporting was available before, but maybe there was another layer of protocol for the E-TTL 2 part (like the max. aperture reporting on the Bigma - where it says f/5.6 to the AF and f/6.3 for the metering).

Hmm no idea. Sounds plausible enough.

i have 2 28-200 tamron and they work with xt,xti.30d without and problems.

steve maec wrote in post #2334612
i have 2 28-200 tamron and they work with xt,xti.30d without and problems.

28-200? Issues being raised are with the 18-200, not the 28-200.

With the Rebel xti try taking out the system battery on the bottom to reset the camera. Not the main battery. This will reset the camera and has been known to solve the issue with a Tamron 28-300 on a Canon 20D getting an error 99.

I rented a Canon 100-400 4-5.6 IS USM for my 10D to take on a trip to Glacier National park. Worked great for two shots then Error 99. Needless to say I was pretty steamed. When I got back from vacation and no tele shots, the camera store thought I was nuts. They tried it on one of their full frame rental DSLRs and it worked great. They thought I was scamming them until they tried in on one of their on rental 10Ds. Lo and behold error 99. Same error on two different 10Ds. Evidently this individual lens had an issue with the contacts for the 10D, (worked fine on the full frame DSLR).

So it is not just less expensive lenses. Even L lenses have this issue from time to time.

Tim
www.pbase.com/irisheye​sphoto

dorsetpete wrote in post #2331282
When will you all learn...
Aftermarket lenses are just that!
They are made cheaply by companies who spend very little in R&D and a vast sums on advertising.
And they are stockesd by retailers because the companies, or their distributors, offer enormous profit margins compared to OE lenses.
And they are reviewed in magazines in who's pages you will see very expensive full page adverts for that very same product.
Well fancy that!
Yup - an old cynic (?) but I am also a retailer who knows how it all works
Happy snapping

???? Were you being sarcastic by any chance

Given that there are so many old EF and EF-S lenses out there, the chances of the XTi having completely a new circuitry than older models and hence the 3rd party lenses along not working is very remote I would think.


There are enough folks on this forum whose older lenses (Canon and 3rd party) work with their XTis. Chances are very high that the contacts on this lens were old.

Its tough to hve any discussion on 3rd party lenses out here these days without some free for all bashing.....

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

dorsetpete wrote in post #2331282
When will you all learn...
Aftermarket lenses are just that!
They are made cheaply by companies who spend very little in R&D and a vast sums on advertising.
And they are stockesd by retailers because the companies, or their distributors, offer enormous profit margins compared to OE lenses.
And they are reviewed in magazines in who's pages you will see very expensive full page adverts for that very same product.
Well fancy that!
Yup - an old cynic (?) but I am also a retailer who knows how it all works
Happy snapping

Well this is plain wrong, in general terms. I will explain below

MrChad wrote in post #2331673
Most 3rd party lenses are reveresed engineered and not licensed (4:3 system is an exception) so they can only design the lens to work with the cameras already out, no promise is made of the lens working on a future body.
....

We have a winner!!! And this is why you have your problem of error 99.

Tamron actually spends quite a bit on R&D. They have a lot of firsts in production covering some long FL range zooms such as the 28-300 and 18-200's. I am not saying that the IQ is better than canon, but when you look at their achievements in size, weight and overall IQ, there is no way you could say they dont spend any significant $$$ on R and D. the SP 90 macro is clearly the leader in its FL the sharpest macro out. Their 180 macro is also tops. Dont get this way form lack of R & D.

Cheaply made is just what a large segment of the market wants. It fills a niche and tamron and sigma do it well. Do I own any tamron or sigma lenses? No (but i have, 28-300, 28-75 and sp 90 and tammy 14mm recto), but I have and still am a tamron fan. If i was shooting macro It would be the sp 90 or 180 for sure. In fact the 28-75, kept me from getting the 24-70 for 2 years. It is great in its class and the canon is better only in build and resale value. As far as resale, its business. Many shops get spiffs for selling tamron and 3rd party stuff, where spiffs are small or nothing for canon and nikon.

Hi , I bought a sigma 70-300 apo from ebay and I don't know if it will work on my XTI, it's in the mail now I discovered the existence of error 99 afterwards...Can anybody telle me if this lens will work on my xti? I have a pic of the lens but can't insert it for some reason. If upgrade is needed how is it done??

trackermikel wrote in post #2425158
Hi , I bought a sigma 70-300 apo from ebay and I don't know if it will work on my XTI, it's in the mail now I discovered the existence of error 99 afterwards...Can anybody telle me if this lens will work on my xti? I have a pic of the lens but can't insert it for some reason. If upgrade is needed how is it done??

Upgrades are done by contacting the lens mfg. You should find the # on the Tamron site. I'd contact Tamron with the lens serial #, it's the surest way to know if the lens should be rechipped/reflashed.

Titus213 wrote in post #2334313
Did you read my whole post?

Yes, and I thought I was agreeing with you.

Originally Posted by Titus213

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Glenn NK wrote in post #2427186
Yes, and I thought I was agreeing with you.

Probably shouldn't say anything, but this is almost too funny!

Goes to show how sometimes our communications don't communicate at all.

Ken

There is thread going on in "business of Photography" that parallels this one. There are 2 strongly divided camps on this subject.