40D – Do Tamron lenses work???

Has anyone tested the 40D with some Tamron lenses yet to see if they still work? I would really like to know if my 17-50 and 90 are going to have problems with the new body since Tamron reverse engineers Canon’s technology vs Sigma who buys it.

MaxxuM wrote in post #3835075
Has anyone tested the 40D with some Tamron lenses yet to see if they still work? I would really like to know if my 17-50 and 90 are going to have problems with the new body since Tamron reverse engineers Canon’s technology vs Sigma who buys it.

shouldn't that be the other way around?

i would expect sigma incompatibility before tamron.

ed rader

Isn't this still all speculation since none of us own a 40D or work with Sigma, Tamron, or Canon?

Sorry, I just never understood all these questions on something that technically doesn't exist yet.

_aravena wrote in post #3835158
Isn't this still all speculation since none of us own a 40D or work with Sigma, Tamron, or Canon?

Sorry, I just never understood all these questions on something that technically doesn't exist yet.

It exists! It exists!

_aravena wrote in post #3835158
Isn't this still all speculation since none of us own a 40D or work with Sigma, Tamron, or Canon?

Sorry, I just never understood all these questions on something that technically doesn't exist yet.

there are plenty of 40d owners.

ed rader

No, they own the privilege of receiving one, but not actually in their possession.

And I said, technically, not actually.

_aravena wrote in post #3835251
No, they own the privilege of receiving one, but not actually in their possession.

And I said, technically, not actually.

No, people have received them. Come on man, this is POTN, you should be in the know.

ed rader wrote in post #3835151
shouldn't that be the other way around?

i would expect sigma incompatibility before tamron.

ed rader

The way I understand it is Sigma is less likely to have problems than Tamron because they pay Canon to use the AF technology while Tamron reverse engineers it meaning they ‘may’ have trouble auto-focusing, sending info to the camera and generally working.

There's nothing drastically changed enough in the 40D body to lens AF that would cause any 3rd party lenses not to work.
Personally, I think that stuff is a thing of the past.

Mr. Clean wrote in post #3835302
There's nothing drastically changed enough in the 40D body to lens AF that would cause any 3rd party lenses not to work.
Personally, I think that stuff is a thing of the past.

You are probably right... But I would still like to hear it

MaxxuM wrote in post #3835294
The way I understand it is Sigma is less likely to have problems than Tamron because they pay Canon to use the AF technology while Tamron reverse engineers it meaning they ‘may’ have trouble auto-focusing, sending info to the camera and generally working.

Nope, Sigma is the only of the 3 main non-OEM players not to pay license fees to Canon, according to my sources. Sigma is the one doing the reverse engineering, not Tamron.

Kind regards, Wim

_aravena wrote in post #3835251
No, they own the privilege of receiving one, but not actually in their possession.

And I said, technically, not actually.

Might actually want to read around the forum...several people have 40Ds in their possession and are actually out using them.


For the OP: There is no earthly reason to expect that Tamron lenses won't work on the 40D. It is just an upgrade to an existing camera line.

wimg wrote in post #3835757
Nope, Sigma is the only of the 3 main non-OEM players not to pay license fees to Canon, according to my sources. Sigma is the one doing the reverse engineering, not Tamron.
Kind regards, Wim

Woolburr wrote in post #3835796
For the OP: There is no earthly reason to expect that Tamron lenses won't work on the 40D. It is just an upgrade to an existing camera line.

Well, this is good to hear


For some reason I though it was the other way around. Thanks for the info guys... Not too worried now.