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.
|