Hank3152
Forum Pro
I think you are expecting too much from this consumer grade lens under these conditions. The 50D has a feature to auto fine tune any lens for front and/or back focusing issues but it cannot improve on sharpness if the optics are mediocre to begin with.
If you shoot a lot in this range you may be better served by acquiring the 70-200f/4IS and 1.4x TC which will dramatically improve your IQ.
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Regards,
Hank
If you shoot a lot in this range you may be better served by acquiring the 70-200f/4IS and 1.4x TC which will dramatically improve your IQ.
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Regards,
Hank