Tamron 17-50mm Front Focus

I started suspecting it a while ago, but it wasn’t until earlier this evening that I confirmed my suspicions of front-focusing with my Tamron 17-50mm. It’s not that bad at wide-angle, but at tele (50mm), it’s very noticeable. I’ll have to give Downtown Camera a call in the morning to see if they can do anything about it. I’d rather not be weeks without my most-used lens and send it off to be calibrated.

Tamron 17-50mm front focus

I focused on ‘TV’. As you can see, the lens seems to have focused in on the author’s last name instead. The 50mm Nikon f/1.8 isn’t exhibiting any issues, so I don’t think it’s the camera.

8 thoughts on “Tamron 17-50mm Front Focus”

  1. I’ve got the D40 and Tamron 17-50mm like you have. Mine seems to be in the same situation as yours. I want to know whether there is a way to solve this problem without changing to another one.
    One more thing, as you said on the other entry, you’re using D40 and cannot autofocus on 50 f/1.8. So how comes can the 50 exhibit the same issue.

  2. The D40 doesn’t have any focus micro-adjustment capabilities like the D300 and above so there’s little possibility of fixing the issue without getting it calibrated. You could see if the store you purchased the lens at has the ability to do a calibration.

    As for the 50mm, I stated that it does not exhibit any front focus issues.

  3. And one more thing, I heard that the front focus issue only appears with max aperture. Maybe it doesn’t happen with smaller aperture.

  4. I figure if it was the camera front-focusing, even when manual focusing and the focused ‘dot’ appears for the 50mm prime, it should be slightly out of focus, but it isn’t.

    Hence, I believe it to be the lens. As for aperture, the front-focusing much less obvious with a smaller aperture, but I think that has more to do with the fact that the DoF is larger, thus reducing the effect of the front-focus, not eliminating it.

  5. Haven’t had a chance to send it in yet. I’m making do with it for the moment. Further reading on the subject seems to indicate the first version without the in-lens motor performs much better from an focus point of view.

    1. I have the 17-50mm as well, and mine seems to have the front focus problem. Did you manage to get yours fixed? Did it take a long time? Where did you have to send it in to?

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