Here's what I got so far researching on the net, forums...
Sigma Tamron
- Fast autofocus (HSM) - Slower AF and a bit noisy
- IQ good until about 150mm? - IQ good at extremes but less sharp on mid-range?
- Very good build quality (EX) - Not as good build "plasticky" daw
- Focusing issues/bad copies - Not many news about front/back focusing issues,
(need to calibrate) heard news about one side not as sharp as other
side (Imbalanced)?
- Service Center/Calibration here in the - Need to send to Japan/HK for servicing?
Phils. (JT Photoworld)
Correct me if I'm wrong on some of the details..
But I'm leaning towards the Sigma right now.
