KEITH-C
Forum Pro
I strongly suspect that the problem lies with the 18-70mm kit lens rather than the camera body.
Just out of interest I tried the 18-70mm with an A900 & tried to improve it with micro focus adjustments & I found that this lens stood out from all the others which I calibrated in that it needed widely different adjustments at either end of the zoom range.
This suggests to me that the focusing capabilities of this particular zoom are a result of a set of compromises which means that the middle range ( around 45mm) is probably where this lens focuses the best with the two extremes giving less than ideal focus. The CZ lens is much better but also much more expensive , many have found the Tamron lenses mentioned a good compromise.
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Keith-C
Just out of interest I tried the 18-70mm with an A900 & tried to improve it with micro focus adjustments & I found that this lens stood out from all the others which I calibrated in that it needed widely different adjustments at either end of the zoom range.
This suggests to me that the focusing capabilities of this particular zoom are a result of a set of compromises which means that the middle range ( around 45mm) is probably where this lens focuses the best with the two extremes giving less than ideal focus. The CZ lens is much better but also much more expensive , many have found the Tamron lenses mentioned a good compromise.
--
Keith-C