[Larrymc]

Hi Larry,

I'm not really talking about the the testing method, because after a few hours spent on practising and watching youtube videos i'm pretty precisly can calibrate the AF myself. The only thing that my Tamron 70-200 needs -7 on 70mm and +3 on 200mm. So withouth this option available AF adjustment is useless on this lense. This function would be extremely useful at least in the K-1.

I feel your pain, my Tamron 70-200 has the same problem so I use it mostly close to 200 mm and only when I need the low light capability of the wider apertures. Mine is AF fine tuned for the long end of the focal length. I have other lens that work better for shorter focal lengths but have to be used at higher ISO values. I suppose you could send the lens to aTamron service facility and let them correct the problem if it can be corrected.

BTW, you do know that Live View AF is a problem with the Tamron also?

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Last edited by Larrymc; 08-11-2018 at 05:58 AM. Reason: more info

[Balazs087]

I've sent in for repair and they could fix it fortunately. Guy in the service told me it still won't be perfect and it's limited what they can do, i wasn't expecting much, but turned out it's now much much better, sharp on every focal length. What a releif. Live View is not working indeed, but that something I can live with.

[Larrymc]

I've sent in for repair and they could fix it fortunately. Guy in the service told me it still won't be perfect and it's limited what they can do, i wasn't expecting much, but turned out it's now much much better, sharp on every focal length. What a releif. Live View is not working indeed, but that something I can live with.

Sounds great, congrats!