Tamron 17-50 f/2.8 focusing problem.

Started Dec 20, 2008 | Discussions thread
007peter Forum Pro • Posts: 11,130
Common problem, try AF @50mm then zoom out to 17mm solution

antiq wrote:

He arrived at a point, where the focusing at 50mm is spot on, while
the 17mm is completely OOF (seems like front focus) and the focal
lengths in between are gradually worse.

I can confirmed the focusing problem it is both rather common and easy to fix. The simple solution is to Pre-Focus @50mm, then zoom out to 17mm. This is a sure-fired way to cure tamron focusing blue.

I wrote about my experience with tamron 17-50mm here [including photos]

I agree with your friend that my "out of focus" shot were almost always @17mm, I have no problem with AF @50mm. Hence, the "pre-focus" @50mm then zoom out to 17mm solution. I hope that helps.

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