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Old 24 Feb 2012, 13:51 (Ref:3030387)   #47
andrewc
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andrewc should be qualifying in the top 10 on the grid
Sigma 100-300 f4 EX in my experience offers superior sharpness and aperture over the Canon 100-400 but usually needs a contrast adjustment in post processing. If that is too much, then the Canon 70-300IS is worth looking at, and at the budget end Canon 55-250IS is pretty good and not heavy. You can also crop heavily and still get images that will print perfectly at A4 or even A3 or larger.
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