Difference between VRII with and without TC20E-III?

InTheMist wrote:

Please let us know the outcome of the service. I'll admit to being extremely disappointed in this combo. Something must be wrong because even my 28-300 is sharper at 300 than 70-200 VRII + TC20e III at 300.
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Ridicule is not C&C nor is it being helpful nor "stating your opinion"
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