I can't wait for the new Sigma 300 2.8 OS.. I hope to be like the new Canon 300 2.8 II IS in image quality.. perhaps, for 2/3 of price?
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How is the autofocusing with this lens? This being a variable aperture lens, does it stop working on cameras (other than 5D3/1DX) when you go beyond 400mm as you are f/5.6 limited with the AF?
|SIGMA 150-500とTAMRON 150-600のAF比較||Small | Large|
The only fault I have found with the Tamron is that numerous people are having problems with AF in AI Servo mode. It sounds like their copies are defective.
Huh ... Numerous users having problems with AF would mean that the problems with the AF unit of the production lenses are to be expected.
To suggest that there are numerous defective lenses out in the market speaks so much for the confidence you have with Tamron.