300 f2.8/1.4xII vs 300 f2.8 II/1.4xIII Much difference in IQ?

Started Jul 12, 2013 | Discussions thread
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BigBen08
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300 f2.8/1.4xII vs 300 f2.8 II/1.4xIII Much difference in IQ?
Jul 12, 2013

Before I sold my 300 f2.8 IS the 1.4x II lived on the lens most the time. I used that combo a lot for airshows. Many have called the tc on this lens as transparent. My experience was different. Although the IQ was good, I never considered it outstanding.

Has anyone compared the IQ of the old version with that of the new 300 f2.8 IS II and 1.4x III ?

I've compared the two lenses/tcs at TDP, and the sharpness/contrast improvement seems significant. But I don't know how much the improvement will show up on photos.

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