Archive for: tamron

Cool Tamron Patent

Cool Tamron Patent

I know, I said “cool” and Tamron in the same sentence. It’s true though.

Want to IS/VC your lenses? Just add this converter!

  • Applications from Tamron
  • Patent Publication No. 2001-33692, 2001-33693, 2001-116994
  • Actuator and a shake correction
  • Power the camera from the supply, or battery use
  • With ON-OFF switch

Google Translated Link



Tamron Lens Phenomenon Update

First reports of repaired lenses.
The first set of Tamron owners have received lenses back from Tamron correcting the cross-type sensor issue with certain Canon DSLR bodies.

The 17-50 f/2.8 VC was sent in and Tamron’s official statement for the fix was “autofocus adjustment”. This is a bit deceptive, what actually was done was a lens ID change from 37 to 137 (85 f/1.2L II lens ID).

Tamron Japan has not officially admitted that there is an issue. Perhaps this is being done to avoid a mass recall of lenses.

Cost of repair?
For the moment, the lens ID switch is covered under the standard warranty. No word on out of warranty products yet.



Tamron Lens Phenomenon Update

New Information about that phenomenon, which is not just a Tamron phenomenon anymore. A guy at the DSLR-forum replaced the Lens-IDs with an EF adapter and found out that the cross-type sensors won’t work on Lenses with the following IDs: 27, 30, 35, 37, 38, 193, 194, 195).

So Tamron was just unlucky by taking the wrong IDs.

The following Canon lenses are also affected:

  • 27 = Canon EF 35-80mm f/4-5.6 (I)
  • 30 = Canon EF 35-105mm f/4.5-5.6
  • 35 = Canon EF 35-80mm f/4-5.6 II
  • 37 = Canon EF 35-80mm f/4-5.6 III
  • 38 = Canon EF 80-200mm f/4.5-5.6
  • 193 = Canon EF 35-80mm f/4-5.6 USM
  • 194 = Canon EF 80-200mm f/4.5-5.6 USM
  • 195 = Canon EF 35-105mm f/4.5-5.6 USM


thanks Jorg

The Tamron 70-200 f/2.8 is also confirmed to have the issue with the 40D, 50D and 7D outer focus points not being crosstype.

7D Affected
A few days ago we reported some Tamron lenses weren’t using the outer crosstype sensors on the Canon 50D.

Tamron Europe has confirmed the Canon 7D and Tamron 17-50 f/2.8 VC also exhibit the same issue.

We’re still waiting for an official response from Tamron in Japan.



Tamron Lens Phenomenon

Interesting issue with Tamron Lenses
I received this information a while back, I didn’t post it until there was some kind of response from Tamron.

The following is a direct quote from the folks that found the problem. Tamron’s response is at the bottom.
i am a member of the german dslr-forum (, which is probably the biggest german speaking community regarding all DSLR-topics (not only Canon). We observed a phenomenon where the followings lenses won’t use the outer cross-type sensors of EOS 40/50/60/7D cameras right.

The lenses that show this problem are (all Tamron):

  • 17-50 f/2.8 VC
  • 60 f/2 Macro
  • 70-200 f/2.8
  • 10-24 f/3.5-4.5

To get a bit more into the detail of the problem – on the 40/50/60D cameras the outer cross-type sensors only work as line-type sensors. To be a bit more correct, they actually work in the same direction as they would work on cams like the 30D or like the 400/450/500/550D. When it comes to the 7D the outer sensors are also only working as line-type sensors (but it seems, that the EF 50 1.2L also has problems to use them correct).

The center cross-type sensor does work at least as a single-cross type sensor (infact we don’t now how to test if the center sensor is working as a dual-cross-type sensor like it’s supposed to work with those f/2.8 and better lenses).

Tamron seems to not know about this behaviour so far. Well – at least, they didn’t confirmed the problem and only said, that they will investigate this.

Maybe a small addition – the Tamron 17-50 VC uses the same lens-ID as the EF 35-80 – maybe you’ll have the chance to check whether this Canon-lens performs correctly or not.

The link to the thread is:

Tamron Europe’s Official Response
Dear Mr. S.,

we were able to reproduce the situation where the Tamron 17-50 VC (B005) and the Tamron 60 Macro (G005) won’t use the Canon EOS 50D cross-type sensors correctly.

We have given this information to Tamron in Japan and we are expect an answer very soon.

Best regards
Tamron Europe GmbH

Thanks Joerg